Pub Date : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609298
Sumali Bansal, Priyanka, R. Bhandari, K. Dharamvir
Under tensile deformation at 0K, gold nanowires progressively thin through a series of metastable ordered structures such as closed structure bond formations, kinks, Zig - Zag chain, straightening of the chain and then finally leading to its breaking at various stages of stretching possessing both structural and mechanical stabilities. Using atomistic simulations, we study the impact of stretching on the structural evolution of Monatomic gold nanochains (MACs) undergoing elongation along with its application in Tubular gold structure using SIESTA (Spanish Initiative for Electronic Simulation with Thousands of Atoms), the computational code based on Density Functional theory method. In particular, our simulations result in a large number of monatomic chains and intermediate structures.
在0K的拉伸变形下，金纳米线通过一系列亚稳态有序结构，如闭合结构键形成、扭结、之字形链、链的拉直，最终导致其在拉伸的各个阶段断裂，从而逐渐变细，具有结构和机械稳定性。本文利用SIESTA (Spanish Initiative for Electronic Simulation with thousand Atoms)基于密度泛函理论方法的计算程序，研究了拉伸对单原子金纳米链(MACs)结构演化的影响及其在管状金结构中的应用。特别是，我们的模拟得到了大量的单原子链和中间结构。
{"title":"Monatomic Gold Nanochains and their encapsulation in Au60Au9 tubular structure","authors":"Sumali Bansal, Priyanka, R. Bhandari, K. Dharamvir","doi":"10.1109/ICANMEET.2013.6609298","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609298","url":null,"abstract":"Under tensile deformation at 0K, gold nanowires progressively thin through a series of metastable ordered structures such as closed structure bond formations, kinks, Zig - Zag chain, straightening of the chain and then finally leading to its breaking at various stages of stretching possessing both structural and mechanical stabilities. Using atomistic simulations, we study the impact of stretching on the structural evolution of Monatomic gold nanochains (MACs) undergoing elongation along with its application in Tubular gold structure using SIESTA (Spanish Initiative for Electronic Simulation with Thousands of Atoms), the computational code based on Density Functional theory method. In particular, our simulations result in a large number of monatomic chains and intermediate structures.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"9 1","pages":"305-308"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90711144","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609274
Prabin Pradhan, V. Muthukumar, Muralikrishna Molli, S. Srivastava, S. Sai, S. Mitra
We report here the nonlinear optical response of Solubilized Multiwalled Carbon Nanotubes (MWNTs) and these decorated with Platinum and Palladium Nanoparticles. Pristine MWNTs were functionalized with COOH group through microwave assisted synthesis route which rendered them soluble in water and other solvents too. Metal salts of Platinum and Palladium were further reduced to metal nanoparticles in presence of MWNT-COOH under microwave irradiation. These hybrid metal decorated carbon nanostructures were morphologically and functionally well characterized using SEM, EDAX, FTIR, UV-Visible etc., Using Z-scan technique, we carried out nonlinear optical studies on aqueous dispersions (stable) of these metal decorated (Pt/Pd-MWNT-COOH) using a high power Nd:YAG Laser with 532 nm excitation with 10 nanosecond pulse width. These samples exhibited significant nonlinear absorption and scattering. The metal decorated MWNT-COOH (Pt-MWNT-COOH:2 Jcm-2; Pd-MWNT-COOH: 1.7Jcm-2) exhibited enhanced optical limiting which is more than plain MWNT-COOH samples and similar Metal-Graphene hybrid dispersions reported earlier in literature. These could be ideally suited for optical power limiting applications.
{"title":"Enhanced optical limiting of solubilized carbon nanotubesdecorated with Pt/Pd nanoparticles","authors":"Prabin Pradhan, V. Muthukumar, Muralikrishna Molli, S. Srivastava, S. Sai, S. Mitra","doi":"10.1109/ICANMEET.2013.6609274","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609274","url":null,"abstract":"We report here the nonlinear optical response of Solubilized Multiwalled Carbon Nanotubes (MWNTs) and these decorated with Platinum and Palladium Nanoparticles. Pristine MWNTs were functionalized with COOH group through microwave assisted synthesis route which rendered them soluble in water and other solvents too. Metal salts of Platinum and Palladium were further reduced to metal nanoparticles in presence of MWNT-COOH under microwave irradiation. These hybrid metal decorated carbon nanostructures were morphologically and functionally well characterized using SEM, EDAX, FTIR, UV-Visible etc., Using Z-scan technique, we carried out nonlinear optical studies on aqueous dispersions (stable) of these metal decorated (Pt/Pd-MWNT-COOH) using a high power Nd:YAG Laser with 532 nm excitation with 10 nanosecond pulse width. These samples exhibited significant nonlinear absorption and scattering. The metal decorated MWNT-COOH (Pt-MWNT-COOH:2 Jcm-2; Pd-MWNT-COOH: 1.7Jcm-2) exhibited enhanced optical limiting which is more than plain MWNT-COOH samples and similar Metal-Graphene hybrid dispersions reported earlier in literature. These could be ideally suited for optical power limiting applications.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"16 1","pages":"193-196"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91141589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609394
T. D. K. Reddy, T. Rao, R. P. Suvarna, M. Kumar
In this paper the tensile strength and modulus of cow dung powder filled glass- polyester hybrid composites were studied. Two different hybrid composites such as treated and untreated cow dung fibers were fabricated and effect of alkali treatment of the cow dung fibers on these properties were studied. It was observed that, tensile strength and modulus of the hybrid composites increases with increase of cow dung percentage of weight. These properties found to be higher when alkali treated cow dung fibers were used in the hybrid composites. The eradication of amorphous hemi-cellulose with alkali treatment leading to higher crystalline of the cow dung fibers with alkali treatment might responsible for these observations. The effect of alkali treatment on the bonding between glass / cow dung composites was also studied. Scanning electron microscope (SEM) was also conducted on the cross sections of fractured surfaces.
{"title":"Prediction on tensile properties of cow dung powder filled glass- polyester hybrid composites","authors":"T. D. K. Reddy, T. Rao, R. P. Suvarna, M. Kumar","doi":"10.1109/ICANMEET.2013.6609394","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609394","url":null,"abstract":"In this paper the tensile strength and modulus of cow dung powder filled glass- polyester hybrid composites were studied. Two different hybrid composites such as treated and untreated cow dung fibers were fabricated and effect of alkali treatment of the cow dung fibers on these properties were studied. It was observed that, tensile strength and modulus of the hybrid composites increases with increase of cow dung percentage of weight. These properties found to be higher when alkali treated cow dung fibers were used in the hybrid composites. The eradication of amorphous hemi-cellulose with alkali treatment leading to higher crystalline of the cow dung fibers with alkali treatment might responsible for these observations. The effect of alkali treatment on the bonding between glass / cow dung composites was also studied. Scanning electron microscope (SEM) was also conducted on the cross sections of fractured surfaces.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"41 1","pages":"702-705"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74078457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609386
Savita Nargundmath, Archana Nandibewoor
As the costs for both processing power and memory have reduced, network support for coded video data has diversified, and advances in video coding technology have progressed, the need has arisen for an industry standard for compressed video representation with substantially increased coding efficiency and enhanced robustness to network environments. The H.264/AVC standard aims to enable significantly improved compression performance compared to all existing video coding standards. In this project we employ two schemes of coding transform coefficients namely exponential Golomb coding & context adaptive variable length coding (CAVLC).And the major part of the contribution is the decoding strategy applied for decoding which results in performance enhancement saving the memory and decoding time which are the most important factors for bandwidth utilization. The transform coefficients are obtained using a simple zigzag scan technique. The consensus among the major players of the communications and video industry on H.264 might provide the major thrust for this new standard.
{"title":"Entropy coding of H.264/AVC using Exp-Golomb coding and CAVLC coding","authors":"Savita Nargundmath, Archana Nandibewoor","doi":"10.1109/ICANMEET.2013.6609386","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609386","url":null,"abstract":"As the costs for both processing power and memory have reduced, network support for coded video data has diversified, and advances in video coding technology have progressed, the need has arisen for an industry standard for compressed video representation with substantially increased coding efficiency and enhanced robustness to network environments. The H.264/AVC standard aims to enable significantly improved compression performance compared to all existing video coding standards. In this project we employ two schemes of coding transform coefficients namely exponential Golomb coding & context adaptive variable length coding (CAVLC).And the major part of the contribution is the decoding strategy applied for decoding which results in performance enhancement saving the memory and decoding time which are the most important factors for bandwidth utilization. The transform coefficients are obtained using a simple zigzag scan technique. The consensus among the major players of the communications and video industry on H.264 might provide the major thrust for this new standard.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"48 1","pages":"607-612"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74276241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609351
A. Anusha, Chithra Parameswaran, P. Revathi, V. Velmurugan
The oxide thickness is of great concern today. The basic idea is to grow SiO2 layer on Silicon. The oxide is grown on intrinsic silicon substrate by thermal oxidation i.e., wet oxidation and dry oxidation. The thickness is compared for both the oxidation processes after different oxidation cycles. The capacitance per unit length is also calculated for the oxide growth in above. The percentage oxide thickness is also estimated and the oxide is found to grow more into the substrate with time and number of cycles.
{"title":"Numerical simulation of dry and wet oxidation of Silicon by TCAD Sprocess","authors":"A. Anusha, Chithra Parameswaran, P. Revathi, V. Velmurugan","doi":"10.1109/ICANMEET.2013.6609351","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609351","url":null,"abstract":"The oxide thickness is of great concern today. The basic idea is to grow SiO2 layer on Silicon. The oxide is grown on intrinsic silicon substrate by thermal oxidation i.e., wet oxidation and dry oxidation. The thickness is compared for both the oxidation processes after different oxidation cycles. The capacitance per unit length is also calculated for the oxide growth in above. The percentage oxide thickness is also estimated and the oxide is found to grow more into the substrate with time and number of cycles.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"210 1","pages":"513-516"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75078487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609252
S. Iyyapushpam, S. Nishanthi, D. Padiyan
Bismuth oxide is prepared by a simple chemical route and it crystallizes in the monoclinic crystal system. The measured optical band gap value of 2.694(1) eV supported that the prepared bismuth oxide can be used as a visible light photocatalyst. The degradation property of bismuth oxide is studied using methyl orange as a model pollutant and a degradation of 85% is achieved in 4 h. The kinetics of bismuth oxide is fitted using pseudo first and second order equations.
{"title":"Degradation of methyl orange using bismuth oxide","authors":"S. Iyyapushpam, S. Nishanthi, D. Padiyan","doi":"10.1109/ICANMEET.2013.6609252","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609252","url":null,"abstract":"Bismuth oxide is prepared by a simple chemical route and it crystallizes in the monoclinic crystal system. The measured optical band gap value of 2.694(1) eV supported that the prepared bismuth oxide can be used as a visible light photocatalyst. The degradation property of bismuth oxide is studied using methyl orange as a model pollutant and a degradation of 85% is achieved in 4 h. The kinetics of bismuth oxide is fitted using pseudo first and second order equations.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"69 1","pages":"249-251"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78211022","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609342
Abhishek Gune, Anu Gupta
In the post silicon era as the silicon reaches its fundamental scaling limits graphene nanoribbons is expected to take over and thus continue the Moore's law about the diminishing size of transistors. Graphene nanoribbons facilitates high speed low power switching applications. Low and high field mobilities of the graphene nanoribbons are found to be higher than the CNTs and CMOS keeping the same unit cell. Such properties of graphene nanoribbons are used in the paper to define RAM memory using GNRs as an effective substitute to CMOS and CNTFETs cache memory. Graphene nanoribbon crossbars are used as the basic programmable devices. This 2-D arrangement of GNRs creates programmable diodes at intersection of each horizontal and vertical GNR rod thus opening up new avenues for building high speed memory and digital devices. The graphene nanoribbons based memory is better than the SRAM in terms of speed, density and performance metrics as well. The noise margin of GNR based memory will be .2 volts higher with respect to lower and upper limits than CMOS counterpart used presently as demonstrated by simulations in the paper. GNR based memory would be operating in the 10 nanometres scale and would be 25-50 per cent denser than the existing SRAM.
{"title":"Graphene nanoribbon based static random access memory for better noise margin and power reduction","authors":"Abhishek Gune, Anu Gupta","doi":"10.1109/ICANMEET.2013.6609342","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609342","url":null,"abstract":"In the post silicon era as the silicon reaches its fundamental scaling limits graphene nanoribbons is expected to take over and thus continue the Moore's law about the diminishing size of transistors. Graphene nanoribbons facilitates high speed low power switching applications. Low and high field mobilities of the graphene nanoribbons are found to be higher than the CNTs and CMOS keeping the same unit cell. Such properties of graphene nanoribbons are used in the paper to define RAM memory using GNRs as an effective substitute to CMOS and CNTFETs cache memory. Graphene nanoribbon crossbars are used as the basic programmable devices. This 2-D arrangement of GNRs creates programmable diodes at intersection of each horizontal and vertical GNR rod thus opening up new avenues for building high speed memory and digital devices. The graphene nanoribbons based memory is better than the SRAM in terms of speed, density and performance metrics as well. The noise margin of GNR based memory will be .2 volts higher with respect to lower and upper limits than CMOS counterpart used presently as demonstrated by simulations in the paper. GNR based memory would be operating in the 10 nanometres scale and would be 25-50 per cent denser than the existing SRAM.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"3 1","pages":"450-452"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79630953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609311
T. Shyju, R. Gopalakrishnan
Nanocrystalline lead sulphide (PbS) thin films were deposited on glass and ITO coated glass substrates by photochemical method. To improve the adhesive nature and properties the films were deposited on ITO coated substrate using photochemical deposition. The deposited films were characterized to study their structural, morphological and electrical properties. The photochemically deposited PbS thin films possess tetragonal system. The dislocation densities of the deposited thin films were evaluated from the X-ray diffraction data. High Resolution Scanning Electron Micrographs of the deposited film shows the oval shape arrangement of particles. The elemental composition of the film was confirmed by Energy Dispersive X-ray analysis. Hall measurements were carried out for the films and their electrical parameters were evaluated. The as-deposited PbS films have positive Hall coefficient, which confirms p-type conductivity.
{"title":"Studies on lead sulphide thin films deposited by photochemical method","authors":"T. Shyju, R. Gopalakrishnan","doi":"10.1109/ICANMEET.2013.6609311","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609311","url":null,"abstract":"Nanocrystalline lead sulphide (PbS) thin films were deposited on glass and ITO coated glass substrates by photochemical method. To improve the adhesive nature and properties the films were deposited on ITO coated substrate using photochemical deposition. The deposited films were characterized to study their structural, morphological and electrical properties. The photochemically deposited PbS thin films possess tetragonal system. The dislocation densities of the deposited thin films were evaluated from the X-ray diffraction data. High Resolution Scanning Electron Micrographs of the deposited film shows the oval shape arrangement of particles. The elemental composition of the film was confirmed by Energy Dispersive X-ray analysis. Hall measurements were carried out for the films and their electrical parameters were evaluated. The as-deposited PbS films have positive Hall coefficient, which confirms p-type conductivity.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"102 1","pages":"340-343"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80563303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609264
P. Vanga, M. Ashok
Fe and Co co-doped ZnO nanoparticles were synthesized by hydrothermal method. Limit of substitution was identified using XRD. Magnetic measurements at room temperature for doped samples showed paramagnetic and ferromagnetic in nature. The reflectance spectra exhibited the absorption peaks corresponding to both dopant and host ions. Emission spectra show defect related peaks, suppression of visible spectra peaks is observed in doped samples.
{"title":"Magnetic and optical studies of Fe and Co co-doped ZnO","authors":"P. Vanga, M. Ashok","doi":"10.1109/ICANMEET.2013.6609264","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609264","url":null,"abstract":"Fe and Co co-doped ZnO nanoparticles were synthesized by hydrothermal method. Limit of substitution was identified using XRD. Magnetic measurements at room temperature for doped samples showed paramagnetic and ferromagnetic in nature. The reflectance spectra exhibited the absorption peaks corresponding to both dopant and host ions. Emission spectra show defect related peaks, suppression of visible spectra peaks is observed in doped samples.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"33 1","pages":"154-156"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88728984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-07-24DOI: 10.1109/ICANMEET.2013.6609290
S. Chauhan, M. Kumar, S. Chhoker, S. C. Katyal
Ba and Mn doped BiFeO3 nanoparticles were synthesized by sol-gel method. X-ray diffraction and Raman spectroscopy results showed the presence of distorted rhombohedral structure for Bi0.85Ba0.15FeO3 nanoparticles and the substitution induced phase transition (rhombohedral to orthorhombic) phase for Bi0.85Mn0.15FeO3 nanoparticles. FESEM images of both the samples revealed grain size in the range from 50 to 100 nm. Magnetic measurement showed room temperature ferromagnetic behavior, which may be attributed to the antiferromagnetic core and the ferromagnetic surface of the nanoparticles, together with the structural distortion caused by Ba and Mn substitution in BiFeO3 samples. The magnetoelectric coupling was evidenced by the observation of the dielectric anomaly in the dielectric constant near antiferromagnetic Neel temperature in both the samples.
{"title":"Structural, raman, dielectric, magnetic and magnetoelectric properties of Ba and Mn doped BiFeO3 nanoparticles","authors":"S. Chauhan, M. Kumar, S. Chhoker, S. C. Katyal","doi":"10.1109/ICANMEET.2013.6609290","DOIUrl":"https://doi.org/10.1109/ICANMEET.2013.6609290","url":null,"abstract":"Ba and Mn doped BiFeO3 nanoparticles were synthesized by sol-gel method. X-ray diffraction and Raman spectroscopy results showed the presence of distorted rhombohedral structure for Bi0.85Ba0.15FeO3 nanoparticles and the substitution induced phase transition (rhombohedral to orthorhombic) phase for Bi0.85Mn0.15FeO3 nanoparticles. FESEM images of both the samples revealed grain size in the range from 50 to 100 nm. Magnetic measurement showed room temperature ferromagnetic behavior, which may be attributed to the antiferromagnetic core and the ferromagnetic surface of the nanoparticles, together with the structural distortion caused by Ba and Mn substitution in BiFeO3 samples. The magnetoelectric coupling was evidenced by the observation of the dielectric anomaly in the dielectric constant near antiferromagnetic Neel temperature in both the samples.","PeriodicalId":13708,"journal":{"name":"International Conference on Advanced Nanomaterials & Emerging Engineering Technologies","volume":"17 1","pages":"275-278"},"PeriodicalIF":0.0,"publicationDate":"2013-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90312597","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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