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Robust magnetic domain of Pt/Co/Au/Cr2O3/Pt stacked films with a perpendicular exchange bias

Authors :
Yoshinori Kotani
Saori Yoshida
Kentaro Toyoki
Tetsuya Nakamura
Yu Shiratsuchi
Hiroaki Yoshida
Ryoichi Nakatani
Chiharu Mitsumata
Source :
Journal of Applied Physics. 127:153902
Publication Year :
2020
Publisher :
AIP Publishing, 2020.

Abstract

Magnetic domain pattern and magnetic domain wall motion are particularly important to understand the magnetization process. Here, we investigated the magnetization process of perpendicularly exchange-biased Pt/Co/Au/Cr2O3/Pt stacked films based on observations of the magnetic domain. In particular, in contrast to previous studies which use fully exchange-biased state, we used the bi-exchange-biased state. We found that the magnetic domain pattern at the remanent state was robust against magnetic-field cycling, which is relevant to the absence of the training effect. The magnetization process was followed by domain wall propagation in the increasing branch of the magnetization curve. In the decreasing branch, both nucleation of the reversed domain and domain wall propagation were involved. The former was accompanied by latency, suggesting that thermal activation played a significant role in the nucleation of the reversed domain.

Details

ISSN :
10897550 and 00218979
Volume :
127
Database :
OpenAIRE
Journal :
Journal of Applied Physics
Accession number :
edsair.doi...........b998d7a560d5048ff73b102a41d852fd
Full Text :
https://doi.org/10.1063/5.0002240