Pub Date : 2023-09-01DOI: 10.31349/revmexfis.69.051701
Miguel Angel García-Castro, F. Díaz-Sánchez, J. A. Galicia-Aguilar, Esmeralda Vidal-Robles
In this research, both the standard molar enthalpy of formation in the crystalline phase and in the gas phase of 3-methylglutaric anhydride was calculated from experimental data. The temperature and enthalpy of fusion, as well as the molar heat capacity in solid phase was calculated by differential scanning calorimetry; the molar enthalpy of sublimation at 298.15 K by the Knudsen effusion method, the molar enthalpy of vaporization at 298.15 K by thermogravimetric analysis, and the standard massic combustion energy by combustion adiabatic calorimetry. Since 3,3-dimethylglutaric anhydride presented crystal transitions (with endothermic points at 352.76 K, 356.98 K and 397.15 K), some of its thermochemical properties were estimated from the functional group-contribution methods proposed by Benson, Gani and Naef and from application of Machine Learning based models.
{"title":"Standard molar enthalpies of formation of 3-methylglutaric and 3,3-dimethylglutaric anhydrides","authors":"Miguel Angel García-Castro, F. Díaz-Sánchez, J. A. Galicia-Aguilar, Esmeralda Vidal-Robles","doi":"10.31349/revmexfis.69.051701","DOIUrl":"https://doi.org/10.31349/revmexfis.69.051701","url":null,"abstract":"In this research, both the standard molar enthalpy of formation in the crystalline phase and in the gas phase of 3-methylglutaric anhydride was calculated from experimental data. The temperature and enthalpy of fusion, as well as the molar heat capacity in solid phase was calculated by differential scanning calorimetry; the molar enthalpy of sublimation at 298.15 K by the Knudsen effusion method, the molar enthalpy of vaporization at 298.15 K by thermogravimetric analysis, and the standard massic combustion energy by combustion adiabatic calorimetry. Since 3,3-dimethylglutaric anhydride presented crystal transitions (with endothermic points at 352.76 K, 356.98 K and 397.15 K), some of its thermochemical properties were estimated from the functional group-contribution methods proposed by Benson, Gani and Naef and from application of Machine Learning based models.","PeriodicalId":21538,"journal":{"name":"Revista Mexicana De Fisica","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42299041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.31349/revmexfis.69.051201
Murat Aygun, Zeynep Aygün, Nazım Karaali
The angular distribution of the 26Mg(3H,2H)27Mg reaction at 36 MeV incident energy is reanalyzed by using the distorted wave Born approximation (DWBA) method. Four forms of the optical model potentials such as temperature dependent and temperature independent density distributions, different nuclear potentials, and different nucleon-nucleon interactionsare used to determine the effect on the 26Mg(3H,2H)27Mg transfer reaction of the entrance channel. These analyses display the similarities and differences of all the approaches which are discussed in this work, and provide alternative density, alternative nuclear potential and alternative nucleon-nucleon interactions.
{"title":"A comprehensive analysis of 26Mg(3H,2H)27Mg reaction at 36 MeV","authors":"Murat Aygun, Zeynep Aygün, Nazım Karaali","doi":"10.31349/revmexfis.69.051201","DOIUrl":"https://doi.org/10.31349/revmexfis.69.051201","url":null,"abstract":"The angular distribution of the 26Mg(3H,2H)27Mg reaction at 36 MeV incident energy is reanalyzed by using the distorted wave Born approximation (DWBA) method. Four forms of the optical model potentials such as temperature dependent and temperature independent density distributions, different nuclear potentials, and different nucleon-nucleon interactionsare used to determine the effect on the 26Mg(3H,2H)27Mg transfer reaction of the entrance channel. These analyses display the similarities and differences of all the approaches which are discussed in this work, and provide alternative density, alternative nuclear potential and alternative nucleon-nucleon interactions.","PeriodicalId":21538,"journal":{"name":"Revista Mexicana De Fisica","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47962977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.31349/revmexfis.69.051002
Akib Abdullah Khan, Samiul Kaiser, Salim Kaiser
The influence of Al and Zn by 10 wt.% as alloying elements on the electrochemical corrosion behaviour of Cu-based alloy in 0.1 M NaCl solution is examined. Results from both electrochemical impedance spectroscopy method and potentiodynamic techniques indicate that the corrosion occurred at a higher rate for Zn and Al added alloys than pure Cu, where Zn added alloy shows the worst corrosion performance. Copper forms stable a protective layer of Cu2O, and CuO, as a result, has a lower corrosion rate. In case of Al and Zn added alloys, dealloying, as well as dissolution of additional Al2O3 and ZnO are responsible for higher corrosion rates, respectively. The surfaces are investigated by optical and scanning electron microscopy. Phases of different intermetallics within the Cu matrix are identified in the etched optical micrographs of the experimental alloys. The optical images after corrosion depict layers of oxides on the surfaces where the Zn-added alloys are highly affected, followed by Al-added alloys and pure Cu. Increased amounts of internal damage to the surface of the Zn-added alloy are visible in the SEM images. The EDX spectrum not only supports the presence of oxide layers but also claims that Zn-containing particles are dissolved at a greater rate than Al.
研究了添加10%的Al和Zn作为合金元素对cu基合金在0.1 M NaCl溶液中电化学腐蚀行为的影响。电化学阻抗谱和动电位分析结果表明，添加Zn和Al合金的腐蚀速率高于纯Cu，其中添加Zn合金的腐蚀性能最差。铜形成稳定的Cu2O保护层，CuO具有较低的腐蚀速率。在添加Al和Zn的情况下，合金的脱合金化以及Al2O3和ZnO的溶解分别导致了较高的腐蚀速率。用光学显微镜和扫描电镜对其表面进行了研究。在实验合金的蚀刻光学显微图中，可以识别出Cu基体中不同金属间化合物的相。腐蚀后的光学图像描绘了表面上的氧化物层，其中添加zn的合金受到严重影响，其次是添加al的合金和纯Cu。在SEM图像中可以看到，添加锌的合金表面的内部损伤量增加。EDX光谱不仅支持氧化层的存在，而且声称含锌颗粒的溶解速度比Al更快。
{"title":"Electrochemical corrosion performance of copper and uniformly alloyed bronze and brass in 0.1 M NaCl solution","authors":"Akib Abdullah Khan, Samiul Kaiser, Salim Kaiser","doi":"10.31349/revmexfis.69.051002","DOIUrl":"https://doi.org/10.31349/revmexfis.69.051002","url":null,"abstract":"The influence of Al and Zn by 10 wt.% as alloying elements on the electrochemical corrosion behaviour of Cu-based alloy in 0.1 M NaCl solution is examined. Results from both electrochemical impedance spectroscopy method and potentiodynamic techniques indicate that the corrosion occurred at a higher rate for Zn and Al added alloys than pure Cu, where Zn added alloy shows the worst corrosion performance. Copper forms stable a protective layer of Cu2O, and CuO, as a result, has a lower corrosion rate. In case of Al and Zn added alloys, dealloying, as well as dissolution of additional Al2O3 and ZnO are responsible for higher corrosion rates, respectively. The surfaces are investigated by optical and scanning electron microscopy. Phases of different intermetallics within the Cu matrix are identified in the etched optical micrographs of the experimental alloys. The optical images after corrosion depict layers of oxides on the surfaces where the Zn-added alloys are highly affected, followed by Al-added alloys and pure Cu. Increased amounts of internal damage to the surface of the Zn-added alloy are visible in the SEM images. The EDX spectrum not only supports the presence of oxide layers but also claims that Zn-containing particles are dissolved at a greater rate than Al.","PeriodicalId":21538,"journal":{"name":"Revista Mexicana De Fisica","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43317327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-09-01DOI: 10.31349/revmexfis.69.050601
M. Segura Delgado
We present a simplified model of a boat to study its rotational dynamics, which is a significant criterion for the development of navigation systems. The stability of a floating body can be examined by means of rotational potential energy, which depends solely on the boat’s gravity center and a point called the metacentric height. Typically, this geometric point is a function of the body’s orientation in relation to the fluid surface, and the estimation of its value can often be ambiguous. This paper presents an alternative method for calculating the metacentric height using a vectorial approach, as well as a general definition of rotational potential energy applicable to this type of problem. The potential energy facilitates the determination of stable and unstable equilibrium directions as a function of the boat’s relative density and orientation.
{"title":"Alternative approach to explore the stability of floating bodies","authors":"M. Segura Delgado","doi":"10.31349/revmexfis.69.050601","DOIUrl":"https://doi.org/10.31349/revmexfis.69.050601","url":null,"abstract":"We present a simplified model of a boat to study its rotational dynamics, which is a significant criterion for the development of navigation systems. The stability of a floating body can be examined by means of rotational potential energy, which depends solely on the boat’s gravity center and a point called the metacentric height. Typically, this geometric point is a function of the body’s orientation in relation to the fluid surface, and the estimation of its value can often be ambiguous. This paper presents an alternative method for calculating the metacentric height using a vectorial approach, as well as a general definition of rotational potential energy applicable to this type of problem. The potential energy facilitates the determination of stable and unstable equilibrium directions as a function of the boat’s relative density and orientation.","PeriodicalId":21538,"journal":{"name":"Revista Mexicana De Fisica","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44196637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-04DOI: 10.31349/revmexfis.69.041002
S. Hassine, O. Farkad, R. Takassa, F. Elfatouaki, O. Choukri, Youssef Ijdiaou, E. Ibnouelghazi, D. Abouelaoualim
An ab initio study using density functional theory (DFT) is carried out to explore the structural, electronic, and opticalproperties of Zn2NbN3 compound. The structural properties of these compound are determined by using the approximation(GGA-PBE) as implemented in WIEN2k. The calculated lattice parameters of the Zn2NbN3 compound are found to bea = 9.91 °A, b = 5.81 °A and c = 5.44 °A . The calculated electronic band structure and density of states indicate that theZn2NbN3 compound is a wide gap semiconductor with a direct band gap of 2.5 eV. The different contributions of the electronicorbitals are discussed using the total and partial DOS with PBE and TB-mBJ approximations , which shows significantcontribution from the Nb-d and N-p. The optical properties such as dielectric function, refractive index, absorption coefficient,and extinction coefficient are calculated and discussed.
{"title":"First-principles investigation of the structural, electronic and optical properties of Zn2NbN3","authors":"S. Hassine, O. Farkad, R. Takassa, F. Elfatouaki, O. Choukri, Youssef Ijdiaou, E. Ibnouelghazi, D. Abouelaoualim","doi":"10.31349/revmexfis.69.041002","DOIUrl":"https://doi.org/10.31349/revmexfis.69.041002","url":null,"abstract":"An ab initio study using density functional theory (DFT) is carried out to explore the structural, electronic, and opticalproperties of Zn2NbN3 compound. The structural properties of these compound are determined by using the approximation(GGA-PBE) as implemented in WIEN2k. The calculated lattice parameters of the Zn2NbN3 compound are found to bea = 9.91 °A, b = 5.81 °A and c = 5.44 °A . The calculated electronic band structure and density of states indicate that theZn2NbN3 compound is a wide gap semiconductor with a direct band gap of 2.5 eV. The different contributions of the electronicorbitals are discussed using the total and partial DOS with PBE and TB-mBJ approximations , which shows significantcontribution from the Nb-d and N-p. The optical properties such as dielectric function, refractive index, absorption coefficient,and extinction coefficient are calculated and discussed.","PeriodicalId":21538,"journal":{"name":"Revista Mexicana De Fisica","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45163419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-04DOI: 10.31349/revmexfis.69.040401
M. Aygun, Z. Aygun
In the present study, radiation shielding characteristics of the borogypsum, which is a waste generated during the boric acid production in Turkey, was analyzed. For this purpose, we used recently developed Phy-X/PSD software, which is provided to calculate shielding parameters such as mass attenuation coefficient, linear attenuation coefficient, half-value layer, tenth-value layer, effective atomic number, total atomic cross section, total electronic cross section, effective conductivity, effective electron number, buildup factors and fast neutron removal cross section in a wide photon energy range. Additionally, mass attenuation coefficients of borogypsum were compared with those of other radiation shielding materials (ordinary concrete, obsidian, pumice, clay) in order to give a significant evaluation about the radiation shielding capability of borogypsum. Half value layer and fast neutron removal cross section values are also evaluated by other materials. It is noticed that borogypsum has higher shielding potential than other reported shielding materials.
{"title":"A comprehensive analysis on radiation shielding characteristics of borogypsum (boron waste) by Phy-X/PSD code","authors":"M. Aygun, Z. Aygun","doi":"10.31349/revmexfis.69.040401","DOIUrl":"https://doi.org/10.31349/revmexfis.69.040401","url":null,"abstract":"In the present study, radiation shielding characteristics of the borogypsum, which is a waste generated during the boric acid production in Turkey, was analyzed. For this purpose, we used recently developed Phy-X/PSD software, which is provided to calculate shielding parameters such as mass attenuation coefficient, linear attenuation coefficient, half-value layer, tenth-value layer, effective atomic number, total atomic cross section, total electronic cross section, effective conductivity, effective electron number, buildup factors and fast neutron removal cross section in a wide photon energy range. Additionally, mass attenuation coefficients of borogypsum were compared with those of other radiation shielding materials (ordinary concrete, obsidian, pumice, clay) in order to give a significant evaluation about the radiation shielding capability of borogypsum. Half value layer and fast neutron removal cross section values are also evaluated by other materials. It is noticed that borogypsum has higher shielding potential than other reported shielding materials. ","PeriodicalId":21538,"journal":{"name":"Revista Mexicana De Fisica","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45585233","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-04DOI: 10.31349/revmexfis.69.040901
Edmundo Márquez Quintos, C. H. Zepeda Fernández, L. F. Rebolledo Herrera, Eduardo Moreno Barbosa
The time resolution (TR) is one of the most important characteristic of a detector. The particular case of a scintillator, the collection of light also is important, it depends of the sensitive area of the photo-sensor (Scorer). Normally, the Scorer of Photomultipliers Tubes (PMTs) is greater than the Scorer of Silicon Photomultipliers (SiPMs). Other differences are the voltage of operation, their size and cost, in some cases, the large size of PMTs can be difficult to place, if small space is required, in which case, it is preferable to use SiPMs. The value of TR also depends of the size and geometry of thescintillator, number of photo-sensors and the electronic part.In this work, we study the mean optical photon arrival time distribution (AT) to a Scorer from a SiPM of 6X6 mm2. We define the variation of AT as the intrinsic time resolution (ITR). In Geant4, we simulated two different geometries: square and hexagonal, for a BC-404 plastic scintillator coupled to one Scorer. The sources simulated were Sr90, Co60, Cs137, Na22 and μ- of 1 GeV. It is shown that AT and ITR depends of the geometry and size of the plastic scintillator, the location of the Scorer, the incident particle and its energy. Then, the ITR and therefore the TR is not a constant for a detector. Finally, we show the relation between AT and the deposited energy by the particle incident, which are related in the experiment to the response time event of the detector and the deposited charge by the incident particle, respectively.
{"title":"Intrinsic time resolution and efficiency study for simulated scintillators plastics with Geant4","authors":"Edmundo Márquez Quintos, C. H. Zepeda Fernández, L. F. Rebolledo Herrera, Eduardo Moreno Barbosa","doi":"10.31349/revmexfis.69.040901","DOIUrl":"https://doi.org/10.31349/revmexfis.69.040901","url":null,"abstract":"The time resolution (TR) is one of the most important characteristic of a detector. The particular case of a scintillator, the collection of light also is important, it depends of the sensitive area of the photo-sensor (Scorer). Normally, the Scorer of Photomultipliers Tubes (PMTs) is greater than the Scorer of Silicon Photomultipliers (SiPMs). Other differences are the voltage of operation, their size and cost, in some cases, the large size of PMTs can be difficult to place, if small space is required, in which case, it is preferable to use SiPMs. The value of TR also depends of the size and geometry of thescintillator, number of photo-sensors and the electronic part.In this work, we study the mean optical photon arrival time distribution (AT) to a Scorer from a SiPM of 6X6 mm2. We define the variation of AT as the intrinsic time resolution (ITR). In Geant4, we simulated two different geometries: square and hexagonal, for a BC-404 plastic scintillator coupled to one Scorer. The sources simulated were Sr90, Co60, Cs137, Na22 and μ- of 1 GeV. It is shown that AT and ITR depends of the geometry and size of the plastic scintillator, the location of the Scorer, the incident particle and its energy. Then, the ITR and therefore the TR is not a constant for a detector. Finally, we show the relation between AT and the deposited energy by the particle incident, which are related in the experiment to the response time event of the detector and the deposited charge by the incident particle, respectively.","PeriodicalId":21538,"journal":{"name":"Revista Mexicana De Fisica","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49666390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-04DOI: 10.31349/revmexfis.69.041701
F. D. J. Guevara Rodríguez
The equation of state to predict solid-liquid-vapor coexistence of heavy n-alkane is developed. In the equation of state, their parameters are functions of the n-alkane molecular weight and were correlated with their corresponding values from methane (16.04g/mol) to eicosane (280.53g/mol) published in reference Chem. Eng. Commun., 209:2, 171, (2022); and the experimental melting temperature value of some heavy n-alkanes (from 100g/mol until 600g/mol).
{"title":"Equation of state for solid-liquid-vapor coexistence for heavy n-alkane","authors":"F. D. J. Guevara Rodríguez","doi":"10.31349/revmexfis.69.041701","DOIUrl":"https://doi.org/10.31349/revmexfis.69.041701","url":null,"abstract":"The equation of state to predict solid-liquid-vapor coexistence of heavy n-alkane is developed. In the equation of state, their parameters are functions of the n-alkane molecular weight and were correlated with their corresponding values from methane (16.04g/mol) to eicosane (280.53g/mol) published in reference Chem. Eng. Commun., 209:2, 171, (2022); and the experimental melting temperature value of some heavy n-alkanes (from 100g/mol until 600g/mol).","PeriodicalId":21538,"journal":{"name":"Revista Mexicana De Fisica","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44126258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-04DOI: 10.31349/revmexfis.69.041603
Hiram Eli Torres Soto, F. Abreu Araujo, J. de la Torre Medina
Herein we report on the magneto-transport properties of disordered three dimensional inverse opals (3D-IOs) fabricated by a standard three-probe electrodeposition technique into the interstices of porous membranes made of 150 nm diameter self assembled poly(methyl methacrylate) spheres. This approach has allowed the synthesis of large scale nanocomposites with exact ferromagnetic NixCo1−x alloy compositions and complex interconnected structure. Particularly, the microstructure of Co-rich 3D-IOs is consistent with the hexagonal close packed hcp texture and its corresponding magnetoresistance is explained in terms of the hcp Co magnetocrystalline anisotropy contribution. Conversely, the magnetoresistive behavior of Ni-rich 3D-IO networks is explained in terms of only their magnetostatic field. The control of these features is made possible by the reduced dimensions of necks and walls, in the 40 nm to 60 nm range, of the 3D-IO structure. Despite the disordered morphology of these 3D-IO nanoarchitectures, their microstructural and magneto-transport properties can be fine tuned due to the reduced nanoscale dimensions of the electrical interconnections. These properties have been found to be comparable to those obtained in other 3D networks, making them interesting systems for their potential use for magnetic sensing and spintronic applications.
{"title":"Magneto-transport behavior of disordered three dimensional NixCo1−x inverse opal networks","authors":"Hiram Eli Torres Soto, F. Abreu Araujo, J. de la Torre Medina","doi":"10.31349/revmexfis.69.041603","DOIUrl":"https://doi.org/10.31349/revmexfis.69.041603","url":null,"abstract":"\u0000\u0000\u0000Herein we report on the magneto-transport properties of disordered three dimensional inverse opals (3D-IOs) fabricated by a standard three-probe electrodeposition technique into the interstices of porous membranes made of 150 nm diameter self assembled poly(methyl methacrylate) spheres. This approach has allowed the synthesis of large scale nanocomposites with exact ferromagnetic NixCo1−x alloy compositions and complex interconnected structure. Particularly, the microstructure of Co-rich 3D-IOs is consistent with the hexagonal close packed hcp texture and its corresponding magnetoresistance is explained in terms of the hcp Co magnetocrystalline anisotropy contribution. Conversely, the magnetoresistive behavior of Ni-rich 3D-IO networks is explained in terms of only their magnetostatic field. The control of these features is made possible by the reduced dimensions of necks and walls, in the 40 nm to 60 nm range, of the 3D-IO structure. Despite the disordered morphology of these 3D-IO nanoarchitectures, their microstructural and magneto-transport properties can be fine tuned due to the reduced nanoscale dimensions of the electrical interconnections. These properties have been found to be comparable to those obtained in other 3D networks, making them interesting systems for their potential use for magnetic sensing and spintronic applications.\u0000\u0000\u0000","PeriodicalId":21538,"journal":{"name":"Revista Mexicana De Fisica","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48498577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-04DOI: 10.31349/revmexfis.69.041605
V. H. Carrera-Escobedo, Kevin Hintze-Madonado, A. Encinas-Oropesa
Building micro and macro sized structures using compacted magnetic nanoparticles is a widely used approach that has proven a great potential as the basis for novel materials made by design. These materials are made by compactation of soft magnetic particles in the nano o micrometer sizes and their macroscopic properties are mostly governed by magnetostatic effects and the combination of the intervening shapes, namely those of the individual particles and that of the piece made with these particles. Herein a simplified mean-field model is presented to describe the magnetostatic effects in soft magnetic composites with cylindrical macroscopic shape made of densely packed ideal spherical soft magnetic particles. The model allows calculating the main magnetic parameters of the system as well as their most relevant tendencies as a function of its main parameters. Furthermore, the model has also been successfully applied to arrays of interacting macroscopic shapes, which provides a further controllable magnetic parameter.
{"title":"Magnetostatic model for magnetic particle agregagates with cylindrical shapes","authors":"V. H. Carrera-Escobedo, Kevin Hintze-Madonado, A. Encinas-Oropesa","doi":"10.31349/revmexfis.69.041605","DOIUrl":"https://doi.org/10.31349/revmexfis.69.041605","url":null,"abstract":"\u0000 \u0000 \u0000Building micro and macro sized structures using compacted magnetic nanoparticles is a widely used approach that has proven a great potential as the basis for novel materials made by design. These materials are made by compactation of soft magnetic particles in the nano o micrometer sizes and their macroscopic properties are mostly governed by magnetostatic effects and the combination of the intervening shapes, namely those of the individual particles and that of the piece made with these particles. Herein a simplified mean-field model is presented to describe the magnetostatic effects in soft magnetic composites with cylindrical macroscopic shape made of densely packed ideal spherical soft magnetic particles. The model allows calculating the main magnetic parameters of the system as well as their most relevant tendencies as a function of its main parameters. Furthermore, the model has also been successfully applied to arrays of interacting macroscopic shapes, which provides a further controllable magnetic parameter. \u0000 \u0000 \u0000","PeriodicalId":21538,"journal":{"name":"Revista Mexicana De Fisica","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48621601","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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