A phenomenological model for the spontaneous exchange bias effect

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:512

Article

Bufaical, L.¹  Coutrim, L. T.²  Bittar, E. M.³  Garcia, F.³ 

[1] Univ Fed Goias, Inst Fis, BR-74001970 Goiania, Go, Brazil

[2] Univ Fed Rio Grande do Norte, Dept Fis, BR-59078900 Natal, RN, Brazil

[3] Ctr Brasileiro Pesquisas Fis, Rua Dr Xavier Sigaud 150, BR-22290180 Rio De Janeiro, RJ, Brazil

关键词: Exchange bias;    Spin-glass;    Double-perovskite;   

DOI  :  10.1016/j.jmmm.2020.167048

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free