Positive and negative exchange bias effects from magnetization reversal in Ho 3+ doped YFe 0.5 Cr 0.5 O 3
| Autor: | Lin Ju, Zhong Lin Wang, C.X. Wei, L.R. Shi, Zefeng Xia, T.S. Xu, X.W. Yan, T.X. Li |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Condensed matter physics Dopant Doping 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Electronic Optical and Magnetic Materials Ion Magnetization Exchange bias 0103 physical sciences Antiferromagnetism Crystallite 0210 nano-technology Anisotropy |
| Zdroj: | Journal of Magnetism and Magnetic Materials. 433:104-108 |
| ISSN: | 0304-8853 |
| DOI: | 10.1016/j.jmmm.2017.03.008 |
| Popis: | The polycrystalline ceramics of Y 1− x Ho x Fe 0.5 Cr 0.5 O 3 (x = 0, 0.05 and 0.1) are synthesized by a sol-gel method. The magnetization reversal and exchange bias effect are investigated in single phase bulk Y 1− x Ho x Fe 0.5 Cr 0.5 O 3 . Magnetic Ho 3+ ion as a dopant is introduced into the system to confirm the influence of A-site ion on the magnetic interactions. The dual reversal of exchange bias field for x = 0.05 is observed, and its characteristic temperatures are corresponding to the compensation temperatures of magnetization reversal. The exchange bias field of x = 0.1 is found to be ∼10.03 kOe at 4 K, revealing a large value compared with that of x = 0. A schematic diagram based on the competition between the single ion anisotropy and Dzyaloshinsky-Moriya interaction, and the antiparallel coupling between the Ho 3+ moments and the canted Cr 3+ /Fe 3+ moments, is used to understand the dual reversal phenomenon of magnetization and exchange bias effect. |
| Databáze: | OpenAIRE |
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