Pub Date : 2024-01-01DOI: 10.15251/jor.2024.201.57
V. Rajpoot, B. Das, V. Rajput, A. Verma
In the current study, the moisture-sensing properties of three Copper (1%) doped Zinc Oxide nanomaterials, CZ-1, CZ-2, and CZ-3, are examined. These substances were created by solid-state interactions involving Cu2O and ZnO, CuO and ZnO, and, separately, Cu and ZnO. After four hours of annealing at 700°C for each of the three pellet samples, humidity-sensing tests were conducted. Throughout the whole range of relative humidity percent (15-90%RH) at room temperature, it was observed that the electrical resistance of all three nanomaterials reduced steadily. Powder x-ray diffractometer and scanning electron microscopy analyses were performed on the nanomaterial pellets to determine their crystallinity, structural phases (gross crystal structure), and surface morphology. Both the Scherer's approach and the Williamson and Hall's method were used to determine the crystallite size of the three samples, CZ-1, CZ-2, and CZ-3. The CZ-3 sample annealed at 700°C had the lowest crystallite size (36 nm) and the highest humidity sensitivity of the three samples.
{"title":"Performance of copper doped zinc oxide nanoparticles synthesized through solid state reaction route for humidity sensing device","authors":"V. Rajpoot, B. Das, V. Rajput, A. Verma","doi":"10.15251/jor.2024.201.57","DOIUrl":"https://doi.org/10.15251/jor.2024.201.57","url":null,"abstract":"In the current study, the moisture-sensing properties of three Copper (1%) doped Zinc Oxide nanomaterials, CZ-1, CZ-2, and CZ-3, are examined. These substances were created by solid-state interactions involving Cu2O and ZnO, CuO and ZnO, and, separately, Cu and ZnO. After four hours of annealing at 700°C for each of the three pellet samples, humidity-sensing tests were conducted. Throughout the whole range of relative humidity percent (15-90%RH) at room temperature, it was observed that the electrical resistance of all three nanomaterials reduced steadily. Powder x-ray diffractometer and scanning electron microscopy analyses were performed on the nanomaterial pellets to determine their crystallinity, structural phases (gross crystal structure), and surface morphology. Both the Scherer's approach and the Williamson and Hall's method were used to determine the crystallite size of the three samples, CZ-1, CZ-2, and CZ-3. The CZ-3 sample annealed at 700°C had the lowest crystallite size (36 nm) and the highest humidity sensitivity of the three samples.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140515876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01DOI: 10.15251/jor.2024.201.65
L. H. K. Alfhaid, A. F. Qasrawi
Herein thin films of CrSe deposited by the thermal evaporation technique onto Pt substrates are designed as Schottky diodes. It is observed that the Pt/CrSe/C (PCC) Schottky diodes are of tunneling type showing barrier height and widths of 0.56 eV and 18 nm, respectively. These diodes displayed biasing dependent nonlinearity and negative slope of differential resistance. The analyses of the cutoff frequency spectra indicated that PCC devices can exhibit high cutoff frequency up to 17 GHz based on the driving signal frequency. The features of the PCC devices make it promising as electronic component suitable for 5G/6G technology applications.
{"title":"Performance of PT/CRSE Schottky diodes designed for 5G/6G technology applications","authors":"L. H. K. Alfhaid, A. F. Qasrawi","doi":"10.15251/jor.2024.201.65","DOIUrl":"https://doi.org/10.15251/jor.2024.201.65","url":null,"abstract":"Herein thin films of CrSe deposited by the thermal evaporation technique onto Pt substrates are designed as Schottky diodes. It is observed that the Pt/CrSe/C (PCC) Schottky diodes are of tunneling type showing barrier height and widths of 0.56 eV and 18 nm, respectively. These diodes displayed biasing dependent nonlinearity and negative slope of differential resistance. The analyses of the cutoff frequency spectra indicated that PCC devices can exhibit high cutoff frequency up to 17 GHz based on the driving signal frequency. The features of the PCC devices make it promising as electronic component suitable for 5G/6G technology applications.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140519887","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01DOI: 10.15251/jor.2024.201.75
A. B. Azzououm, A. Aissat, J. Vilcot
This paper focuses on studying and simulating a GaAs1-xPx/Si1-yGey/Ge triple-junction solar cell structure. First, the strain and the bandgap energy associated to the SiGe layer have been studied. The optimal germanium concentration is 0.88 with a strain around 0.45%. Then, the phosphor concentration effect on the strain and the bandgap energy of the upper layer GaAs1-xPx/Si0.12Ge0.88 has been optimized. At room temperature, the optimal output parameter reach Jsc=34.41mA/cm2 , Voc=1.27V, FF=88.42% and η=38.45% for an absorber thickness of 4.5µm and x=0.47, with a strain that doesn’t exceed 1.5%. This study has enabled us to design a high-efficiency, low cost 3J solar cell.
{"title":"Simulation and optimization of GaAs1-xPx/Si1-yGey/Ge triple junction solar cells","authors":"A. B. Azzououm, A. Aissat, J. Vilcot","doi":"10.15251/jor.2024.201.75","DOIUrl":"https://doi.org/10.15251/jor.2024.201.75","url":null,"abstract":"This paper focuses on studying and simulating a GaAs1-xPx/Si1-yGey/Ge triple-junction solar cell structure. First, the strain and the bandgap energy associated to the SiGe layer have been studied. The optimal germanium concentration is 0.88 with a strain around 0.45%. Then, the phosphor concentration effect on the strain and the bandgap energy of the upper layer GaAs1-xPx/Si0.12Ge0.88 has been optimized. At room temperature, the optimal output parameter reach Jsc=34.41mA/cm2 , Voc=1.27V, FF=88.42% and η=38.45% for an absorber thickness of 4.5µm and x=0.47, with a strain that doesn’t exceed 1.5%. This study has enabled us to design a high-efficiency, low cost 3J solar cell.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140519837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-01-01DOI: 10.15251/jor.2024.201.13
M. Riaz, M. Ali, F. Fareed, S. M. Ali, M. Alam
The Y2O3 doped polypyrrole composites has been synthesized (PPy-Y2O3) through an insitu polymerization route, to get dielectric properties for potential applications. XRD confirmed the formation of the composites. SEM confirms the flakier structure in the PPyY2O3. The impedance of pure Y2O3 ~ 14 Ω, PPy ~12 Ω to PPy-10%Y2O3 ~10 Ω compositesdecreased, signify the increase in AC conductivity of PPy-Y2O3. The temperature-dependent dielectric properties follow the Maxwell-Wagner model. AC conductivity of the PPy/Y2O3, increased with an increase in temperature depending on Jonscher’s power law. Therefore, the present study suggested that PPy-Y2O3 composites can be considered useful for device applications.
{"title":"Temperature dependent dielectric characteristics of PPY/Y2O3 composite","authors":"M. Riaz, M. Ali, F. Fareed, S. M. Ali, M. Alam","doi":"10.15251/jor.2024.201.13","DOIUrl":"https://doi.org/10.15251/jor.2024.201.13","url":null,"abstract":"The Y2O3 doped polypyrrole composites has been synthesized (PPy-Y2O3) through an insitu polymerization route, to get dielectric properties for potential applications. XRD confirmed the formation of the composites. SEM confirms the flakier structure in the PPyY2O3. The impedance of pure Y2O3 ~ 14 Ω, PPy ~12 Ω to PPy-10%Y2O3 ~10 Ω compositesdecreased, signify the increase in AC conductivity of PPy-Y2O3. The temperature-dependent dielectric properties follow the Maxwell-Wagner model. AC conductivity of the PPy/Y2O3, increased with an increase in temperature depending on Jonscher’s power law. Therefore, the present study suggested that PPy-Y2O3 composites can be considered useful for device applications.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":1.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140521845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.15251/jor.2023.196.615
K. A. Mohammed, K. H. Salem, M. F. Jawaad, M. A. Alkhafaji, R. S. Zabibah
This study presents the synthesis of a novel ovonic nanomaterial by the chemical route approach, involving the combination of three distinct materials: polyvinyl alcohol (PVA), iron oxide (Fe2O3), and selenium (Se) nanoparticles. The produced material underwent evaluation using various analytical techniques, including Xray diffraction (XRD), energydispersive Xray spectroscopy (EDS), scaning electron microscope (SEM), and UV-Visible spectrophotometer. The focus of the work revolved around a unique hybrid structure consisting of selenium nanoparticles that were embedded within a polyvinyl alcohol and iron(III) oxide. The examination of micro structure information yielded findings that support the notion that Se nanoparticles have an impact on the structural properties of PVA/Fe2O3. (XRD) and (EDS) examines provided confirmation of the formation of a novel composite structure. The produced composites had notable absorption peaks at a wavelength of 530 nm for PVA-Fe2O3-CdZnS. These composites exhibited a progressive transition towards absorption in higher wavelength areas. The composite material that has been suggested for potential utilization in forthcoming energy storage applications.
{"title":"Designing and studying of PVA/Fe2O3/Se as new ovonic material for possible storage application","authors":"K. A. Mohammed, K. H. Salem, M. F. Jawaad, M. A. Alkhafaji, R. S. Zabibah","doi":"10.15251/jor.2023.196.615","DOIUrl":"https://doi.org/10.15251/jor.2023.196.615","url":null,"abstract":"This study presents the synthesis of a novel ovonic nanomaterial by the chemical route approach, involving the combination of three distinct materials: polyvinyl alcohol (PVA), iron oxide (Fe2O3), and selenium (Se) nanoparticles. The produced material underwent evaluation using various analytical techniques, including Xray diffraction (XRD), energydispersive Xray spectroscopy (EDS), scaning electron microscope (SEM), and UV-Visible spectrophotometer. The focus of the work revolved around a unique hybrid structure consisting of selenium nanoparticles that were embedded within a polyvinyl alcohol and iron(III) oxide. The examination of micro structure information yielded findings that support the notion that Se nanoparticles have an impact on the structural properties of PVA/Fe2O3. (XRD) and (EDS) examines provided confirmation of the formation of a novel composite structure. The produced composites had notable absorption peaks at a wavelength of 530 nm for PVA-Fe2O3-CdZnS. These composites exhibited a progressive transition towards absorption in higher wavelength areas. The composite material that has been suggested for potential utilization in forthcoming energy storage applications.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135615820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.15251/jor.2023.196.623
M. H. Mustafa, A. A. Shihab
At a substrate temperature of 320 o C, a chemical spray pyrolysis approach was applied. to create tungsten oxide thin films on glass substrates with varying Au nanoparticle doping concentrations (0, 0.04 and 0.08 M) that have a thickness of roughly 250 nm. Investigated were the structural and optical characteristics. The films were amorphous to the pure films at the substrate temperature (320 °C), according to X-ray diffraction and remain so even after adding GNPs, because the WO3 structure is amorphous in all samples, whereas the cubic structure of the gold nanoparticles. The morphology of the films was examined using atomic force microscopy (AFM), which showed a decrease in the grain size of the films doped with gold compared to the thin films before the doping process. a UV-Vis spectrophotometer was used to examine the membranes' optical characteristics between the wavelengths of (300-1000) nm. was the optical energy gap of the films (3.23) eV for tungsten oxide film and decreased after adding nanoscale gold to (3.04, 2.95) eV for films doped with different proportions of Au NPs (0.04, 0.08 M), respectively. Hall testing confirms that with 8 (mM) Gold (Au) doping, WO3 material of the n type was obtained with a maximum carrier mobility of 219.92(cm2 /Vs) and conductivity of 6.52 (Ω.cm)-1 . The I-V characteristics of the photovoltaic formed under illumination were determined by measuring the incident power density (100 mW/cm2 ) at varied Au doping levels.
{"title":"Effect of ratio gold nanoparticles on the properties and efficiency photovoltaic of thin films of amorphous tungsten trioxide","authors":"M. H. Mustafa, A. A. Shihab","doi":"10.15251/jor.2023.196.623","DOIUrl":"https://doi.org/10.15251/jor.2023.196.623","url":null,"abstract":"At a substrate temperature of 320 o C, a chemical spray pyrolysis approach was applied. to create tungsten oxide thin films on glass substrates with varying Au nanoparticle doping concentrations (0, 0.04 and 0.08 M) that have a thickness of roughly 250 nm. Investigated were the structural and optical characteristics. The films were amorphous to the pure films at the substrate temperature (320 °C), according to X-ray diffraction and remain so even after adding GNPs, because the WO3 structure is amorphous in all samples, whereas the cubic structure of the gold nanoparticles. The morphology of the films was examined using atomic force microscopy (AFM), which showed a decrease in the grain size of the films doped with gold compared to the thin films before the doping process. a UV-Vis spectrophotometer was used to examine the membranes' optical characteristics between the wavelengths of (300-1000) nm. was the optical energy gap of the films (3.23) eV for tungsten oxide film and decreased after adding nanoscale gold to (3.04, 2.95) eV for films doped with different proportions of Au NPs (0.04, 0.08 M), respectively. Hall testing confirms that with 8 (mM) Gold (Au) doping, WO3 material of the n type was obtained with a maximum carrier mobility of 219.92(cm2 /Vs) and conductivity of 6.52 (Ω.cm)-1 . The I-V characteristics of the photovoltaic formed under illumination were determined by measuring the incident power density (100 mW/cm2 ) at varied Au doping levels.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135615193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.15251/jor.2023.196.607
A. Missoum, N. G. Sabri, M. Daoudi, H. Guedaouria, A. Benamara
In this work, we focused on investigating the eigen frequency and internal standing wave characteristics of a vertical surface cavity emitting laser operating at a wavelength of 1.55 µm. The design of the cavity involved determining the cavity length, selecting the material for the cavity spacer, and carefully placing the quantum wells within the cavity to achieve maximum overlap with the electric field. In our case, the choice of the dielectric Bragg mirror with SiO2/TiO2 layers helps in achieving high reflectivity and low optical losses. The quantum wells are strategically placed within the cavity to ensure maximum overlap with the electric field. This allows for efficient carrier injection and recombination, leading to laser emission. The specific composition of the quantum wells, In0.54Ga0.46As0.99P0.01 / In0.75Ga0.25As0.55P0.45, indicates the proportions of indium (In), gallium (Ga), arsenic (As), and phosphorus (P) in the material. These compositions are chosen to achieve the desired electronic band structure and emission wavelength. By studying the eigen frequency and internal standing waves in our designed laser cavity, our aim is to understand the resonant modes and behavior of light within the device. This knowledge is crucial for optimizing the laser's performance and improving its efficiency for various applications.
{"title":"Study of eigen frequency In1-xGaxAsyP1-y 1.55 µm VCSEL with SiO2 /TiO2 dielectric Bragg reflector","authors":"A. Missoum, N. G. Sabri, M. Daoudi, H. Guedaouria, A. Benamara","doi":"10.15251/jor.2023.196.607","DOIUrl":"https://doi.org/10.15251/jor.2023.196.607","url":null,"abstract":"In this work, we focused on investigating the eigen frequency and internal standing wave characteristics of a vertical surface cavity emitting laser operating at a wavelength of 1.55 µm. The design of the cavity involved determining the cavity length, selecting the material for the cavity spacer, and carefully placing the quantum wells within the cavity to achieve maximum overlap with the electric field. In our case, the choice of the dielectric Bragg mirror with SiO2/TiO2 layers helps in achieving high reflectivity and low optical losses. The quantum wells are strategically placed within the cavity to ensure maximum overlap with the electric field. This allows for efficient carrier injection and recombination, leading to laser emission. The specific composition of the quantum wells, In0.54Ga0.46As0.99P0.01 / In0.75Ga0.25As0.55P0.45, indicates the proportions of indium (In), gallium (Ga), arsenic (As), and phosphorus (P) in the material. These compositions are chosen to achieve the desired electronic band structure and emission wavelength. By studying the eigen frequency and internal standing waves in our designed laser cavity, our aim is to understand the resonant modes and behavior of light within the device. This knowledge is crucial for optimizing the laser's performance and improving its efficiency for various applications.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135614423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.15251/jor.2023.195.587
H. Al-Dmour, D.M. Taylor
This work studies the influence of the properties of nanocrystalline -titanium dioxide (ncTiO2) films on the performance of solar cells based on the Organic materials/ncTiO2 multilayer structure. That was investigated using X-ray diffraction, Atomic force microscopy (AFM), and Source-Measure Unit(SMU) under different ambient conditions. The device produced from batch A exhibit better performance compared to the device produced from batch B. The short circuit current, Jsc, increases from 0.03 mA/cm2 to 0.22 mA/cm2 , and the power conversion efficiency, η, from 0.01% to 0.09% in comparison between batches A and B solar cells. That is attributed to the grains of batch A nc-TiO2 having a size of 25 nm and a height of 100 nm, while particles of batch B nc-TiO2 film have a height of 40 nm and a size of 19 nm. These features cause to increase in the resistance and defects throughout the bulk region and interfaces of Batch B solar cells and impact the mechanism processes of charge generation of solar cells.
{"title":"Effect of properties of NC-TiO2 grains on the performance of organic/inorganic solar cells","authors":"H. Al-Dmour, D.M. Taylor","doi":"10.15251/jor.2023.195.587","DOIUrl":"https://doi.org/10.15251/jor.2023.195.587","url":null,"abstract":"This work studies the influence of the properties of nanocrystalline -titanium dioxide (ncTiO2) films on the performance of solar cells based on the Organic materials/ncTiO2 multilayer structure. That was investigated using X-ray diffraction, Atomic force microscopy (AFM), and Source-Measure Unit(SMU) under different ambient conditions. The device produced from batch A exhibit better performance compared to the device produced from batch B. The short circuit current, Jsc, increases from 0.03 mA/cm2 to 0.22 mA/cm2 , and the power conversion efficiency, η, from 0.01% to 0.09% in comparison between batches A and B solar cells. That is attributed to the grains of batch A nc-TiO2 having a size of 25 nm and a height of 100 nm, while particles of batch B nc-TiO2 film have a height of 40 nm and a size of 19 nm. These features cause to increase in the resistance and defects throughout the bulk region and interfaces of Batch B solar cells and impact the mechanism processes of charge generation of solar cells.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136204872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.15251/jor.2023.195.557
H. T. Ali, M. Akhtar, M. I. Arshad, N. Amin, A. U. Rehman, Z. Latif, M. A. Mehmood, M. A. Naveed
Zin substituted Mg-Mn-Bi nano ferrites, Mg0.5 𝑀𝑀𝑀𝑀0.5−x 𝑍𝑍𝑍𝑍x 𝐵𝐵𝑖𝑖0.05Fe1.95O4 (x= 0, 0.125, 0.25, 0.375, 0.5) were synthesized using the sol gel auto combustion method. Structural parameters were analyzed through x-ray diffraction. It was revealed that all the samples are single phase spinel structure with Fd-3m space group and crystallite size, lattice constant and x-ray densities were varying with Zn concentration. RAMAN analysis showed the cation vibration. The DC resistivity was enhanced of all the samples with increasing concentration of Zn. The substitution of Zn also responsible for the variation of magnetic parameters as observed with VSM. Due to these remarkable properties all the prepared samples may be utilized at high frequency in microwave devices.
{"title":"Tailoring of Structural, electrical, and dielectric properties of Mg-Mn-Bi nanoferrites with addition of Zn","authors":"H. T. Ali, M. Akhtar, M. I. Arshad, N. Amin, A. U. Rehman, Z. Latif, M. A. Mehmood, M. A. Naveed","doi":"10.15251/jor.2023.195.557","DOIUrl":"https://doi.org/10.15251/jor.2023.195.557","url":null,"abstract":"Zin substituted Mg-Mn-Bi nano ferrites, Mg0.5 𝑀𝑀𝑀𝑀0.5−x 𝑍𝑍𝑍𝑍x 𝐵𝐵𝑖𝑖0.05Fe1.95O4 (x= 0, 0.125, 0.25, 0.375, 0.5) were synthesized using the sol gel auto combustion method. Structural parameters were analyzed through x-ray diffraction. It was revealed that all the samples are single phase spinel structure with Fd-3m space group and crystallite size, lattice constant and x-ray densities were varying with Zn concentration. RAMAN analysis showed the cation vibration. The DC resistivity was enhanced of all the samples with increasing concentration of Zn. The substitution of Zn also responsible for the variation of magnetic parameters as observed with VSM. Due to these remarkable properties all the prepared samples may be utilized at high frequency in microwave devices.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135459637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-01DOI: 10.15251/jor.2023.195.547
A. Saleem, M. S. Shifa, S. A. Buzdar, H. M. N. ul H. K. Asghar, M. Mustaqeem, Z. A. Gilani, S. M. Ali, M. A. Shar, A K. Khan
Li-Co spinal ferrites were synthesized in pure and doped form by substituting/doping a post transition metal, bismuth in varying concentrations using micro-emulsion technique. Effect of bismuth substitution was studied by investigating the structural and magnetic properties in detail. X-ray diffractometer results confirmed the creation of single phase along with a slight occurrence of orthophase in prepared ferrites. Average crystallite size increased from 14 to 28 nm by increase in bismuth concentration. SEM micrographs were in complete agreement with XRD results showing spherical to cubic grains which was a confirmation of cubic spinal structure. Average estimated grain size of 52 nm showing agglomeration was also a good testimony of XRD results. VSM technique was employed to study magnetic properties of prepared samples within applied magnetic field strength of -10,000Oe to 10,000Oe. Ms and Hc values were observed to be decreasing with increasing bismuth content. Lower Ms and Hc values made our newly synthesized material fit for transformer cores and induction purposes.
{"title":"Structural and magnetic effect of bismuth substitution on Li-Co ferrite synthesized through microemulsion method","authors":"A. Saleem, M. S. Shifa, S. A. Buzdar, H. M. N. ul H. K. Asghar, M. Mustaqeem, Z. A. Gilani, S. M. Ali, M. A. Shar, A K. Khan","doi":"10.15251/jor.2023.195.547","DOIUrl":"https://doi.org/10.15251/jor.2023.195.547","url":null,"abstract":"Li-Co spinal ferrites were synthesized in pure and doped form by substituting/doping a post transition metal, bismuth in varying concentrations using micro-emulsion technique. Effect of bismuth substitution was studied by investigating the structural and magnetic properties in detail. X-ray diffractometer results confirmed the creation of single phase along with a slight occurrence of orthophase in prepared ferrites. Average crystallite size increased from 14 to 28 nm by increase in bismuth concentration. SEM micrographs were in complete agreement with XRD results showing spherical to cubic grains which was a confirmation of cubic spinal structure. Average estimated grain size of 52 nm showing agglomeration was also a good testimony of XRD results. VSM technique was employed to study magnetic properties of prepared samples within applied magnetic field strength of -10,000Oe to 10,000Oe. Ms and Hc values were observed to be decreasing with increasing bismuth content. Lower Ms and Hc values made our newly synthesized material fit for transformer cores and induction purposes.","PeriodicalId":49156,"journal":{"name":"Journal of Ovonic Research","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135458775","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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