A phenomenological model for the spontaneous exchange bias effect
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2020
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In this work we propose an alternative model to explain the spontaneous exchange bias (SEB) effect observed in spin glass (SG)-like systems. As in a previously proposed model [1], it is based on the unconventional dynamics of the SG-like moments at the magnetic hysteresis cycle. However, using a reliable estimate of the amount of SG-spins that are relaxing during the cycle, the new model can correctly describe the changes in the SEB observed for measurements performed at different temperatures and different maximum applied fields.
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Exchange bias, Spin-glass, Double-perovskite
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BUFAIÇAL, L.; COUTRIM, L. T.; BITTAR, E. M.; GARCIA, F. A phenomenological model for the spontaneous exchange bias effect. Journal of Magnetism and Magnetic Materials, Amsterdam, v. 512, e167048, 2020. DOI: 10.1016/j.jmmm.2020.167048. Disponível em: https://www.sciencedirect.com/science/article/pii/S030488532030888X. Acesso em: 16 fev. 2024.