The effect of Gd3+ and Cd2+ substitution on magnetization of copper ferrite |
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| Institution: | 1. Shankarrao Mohite Mahavidyalaya, Akluj. Dist: Solapur 413 101, India;2. Department of Electronics, Shivaji University, Kolhapur 416 004, India;1. Physics Department, Faculty of Science, Zagazig University, Zagazig, Egypt;2. Materials Science and Nanotechnology Department, Faculty of Post graduate Studies for Advanced Sciences, (PSAS), Beni-Suef University, Beni-Suef, Egypt;1. College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China;2. Hang Zhou City of Quality and Technical Supervision and Testing Institute, Hangzhou 310019, China;1. Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes, National Laboratory of Mineral Materials, School of Materials Science and Technology, China University of Geosciences, Beijing 100083, China;2. School of Engineering and Technology, China University of Geosciences, Beijing 100083, China;3. School of Environmental Sciences and Engineering, Peking University, Beijing 100871, China;1. Department of Electronic Electrical and Computer Engineering, Sungkyunkwan University, Republic of Korea;2. Department of Biomedical Engineering, Yonsei University, Republic of Korea;3. Department of Biomedical Engineering, Hanyang University, Republic of Korea;4. School of Electronic and Electrical Engineering, Sungkyunkwan University, Republic of Korea;1. School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian 223000, China;2. Jiangsu Hanbon Science & Technology Co., Ltd., Huaian 223000, China;3. Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China |
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| Abstract: | Polycrystalline compositions of soft ferrite system, CdxCu1−xFe2−yGdyO4 (X=0.00, 0.20, 0.40, 0.60, 0.80 and 1.00; y=0.00, 0.10 and 0.30) were prepared by standard ceramic method. X-ray diffraction study show formation of single phase cubic spinel ferrite for the compositions X⩾0.20 and tetragonal nature for compositions X=0.00, for all values of Gd3+ (y=0.00, 0.10 and 0.30) concentration. Saturation magnetization and magnetic moments were found to be increasing with cadmium concentration up to X=0.40, for all values of Gd3+ content, obeying Neel's two sublattice model and decreases thereafter, showing existence of non-collinear spin interaction. The Gd3+ substitution results into reaction in the magnetic moments. This is due to occupancy of Gd3+ ion on octahedral (B) site, resulting into dilution in the magnetization of B sublattices. The Curie temperatures for all compositions are found to be decreasing with substitution of Cd2+ concentration. This is attributed to the occupancy of cadmium on tetrahedral (A) site, causing dilution in the inter site magnetic interaction. The temperature dependence of AC susceptibility is also studied and its behaviour is explained on the basis of domain structure. |
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