Bulletin of materials science | |
Comparison of the irreversible thermomagnetic behaviour of some ferro- and ferrimagnetic systems | |
P A Joy2  S K Date2  P S Anil Kumar1  | |
[1] Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$Information Storage Technology Group, MESA Research Institute, University of Twente, 7500 AE Enschede, The Netherlands$$Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, IndiaPhysical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$Information Storage Technology Group, MESA Research Institute, University of Twente, 7500 AE Enschede, The Netherlands$$Information Storage Technology Group, MESA Research Institute, University of Twente, 7500 AE Enschede, The NetherlandsPhysical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$Information Storage Technology Group, MESA Research Institute, University of Twente, 7500 AE Enschede, The Netherlands$$;Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, IndiaPhysical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$ | |
关键词: Ferromagnet; ferrimagnet; thermomagnetic irreversibility; magnetocrystalline anisotropy; coercivity.; | |
DOI : | |
学科分类:材料工程 | |
来源: Indian Academy of Sciences | |
【 摘 要 】
The magnetic behaviour of two ferromagnetic oxides and two ferrimagnetic oxides (ferrites) are compared to study the effect of magnetocrystalline anisotropy on thermal-history-dependence of magnetization of these ordered magnetic systems. All four compounds show thermomagnetic irreversibility (ð‘€FC > ð‘€ZFC) below a certain temperature, ð‘�??irr. The highly anisotropic ferromagnetic oxide, SrRuO3 and the hard ferrite, SrFe12O19 show sharp peaks below ð‘�??ð‘�? in their ð‘€ZFC(ð‘�??) curves, whereas for the soft ferrite Ni0.8Zn0.2Fe2O4 and the low anisotropic ferromagnetic oxide La0.7Ca0.3MnO3 only a broad maximum is observed in ð‘€ZFC, when measured in small magnetic fields. The shapes of the ð‘€ZFC(ð‘�??) curves are inversely-related to the magnitude of the coercivities (ð»c) of the compounds in relation to the applied field, and the temperature dependence of (ð»c). ð‘€FCand ð‘€ZFC are related through the coercivity for all four magnetic systems.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912010228068ZK.pdf | 155KB | download |