Preparation and magnetic properties of La-substituted Zn–Cu–Cr ferrites via a rheological phase reaction method |
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| Authors: | Xiangchun Zhou Jing Jiang Liangchao Li Feng Xu |
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| Institution: | 1. College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434020, Hubei, China;2. Institute of Physical Chemistry, Department of Chemistry, Zhejiang Normal University, Jinghua 321004, China;3. School of Chemistry and Chemical Industry, China West Normal University, Nanchong 637002, China |
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| Abstract: | Nanocrystalline La-substituted Zn–Cu–Cr ferrites Zn0.6Cu0.4Cr0.5LaxFe1.5−xO4 (x=0.00, 0.02, 0.04, 0.06) were prepared by a rheological phase reaction method. The obtained powders were characterized by X-ray diffractometer, transmission electron microscopy and vibrating sample magnetometer. Permeability of the samples was investigated using an impedance analyzer. The results indicated that ferrite samples had the single spinel phase at low La content. Lattice parameter increased with increasing La content, while particle size calculated from Scherrer's formula decreased with increasing La content in La-substituted ferrite samples. The magnetic properties of La-substituted ferrites were strongly affected by La content. The saturation magnetization decreased, while coercivity increased with increasing La content. The variation of real permeability with La content was investigated in the frequency range of 1 MHz–1 GHz. |
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| Keywords: | 75 50 Gg 61 66 Fn 75 60 Ej |
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