Perpendicular magnetic anisotropy induced by antiferromagnetic layers through antiferromagnetic proximity effects and long-range exchange coupling

Bo-Yao Wang^1*

¹Department of physics, National Changhua University of Education, Changhua City, Taiwan

* Presenter:Bo-Yao Wang, email:bywang1735@cc.ncue.edu.tw

Antiferromagnets are a class of magnetic materials with rich physical properties and potential applications. In this talk, I will introduce a series of research results on how antiferromagnetic (AFM) thin alloy films induce perpendicular magnetic anisotropy (PMA) on adjacent ferromagnetic (FM) layers [1-3]. Additionally, I will show you that a single AFM film in a composite AFM layer can not only enhance long-range AFM ordering in its adjacent AFM neighbors but also provide control over the AFM spin structure. This so-called “AFM proximity effect” within the AFM composite layer can then induce PMA in the adjacent FM film [4]. Furthermore, I will show you that long-range exchange coupling between AFM FeMn films can be established through Cu; this coupling effect leads to modulation of the induced PMA and can be attributed to conducting electrons at the Fermi surface of Cu.

References:

[1] B.-Y. Wang*, M.-S. Tsai, C.-W. Huang, C.-W. Shih, C.-J. Chen, K. Lin, J.-J. Li, N.-Y. Jih, C.-I Lu, T.-H. Chuang, and D.-H. Wei, Phys. Rev. B 96, 094416 (2017).
[2] B. Y. Wang*, J. Y. Ning, T. H. Li, C. C. Chung, C. Y. Hsu, M. S. Tsai, T. H. Chuang, and D. H. Wei, Phys. Rev. B 105, 184415 (2022).
[3] B.-Y. Wang*, Jie-Ying Lee, Wan-Lin Li, Kai Lin, Ming-Shian Tsai, Tzu-Hung Chuang, and Der-Hsin Wei, Phys. Rev. B 107, 104429 (2023).
[4] B.-Y. Wang*, T.-H. Li, B.-X. Liao, C.-H. Hsiao, L.-H. Chang, M.-S. Tsai, T.-H. Chuang, and D.-H. Wei, accepted by Phys. Rev. B.

Keywords: Perpendicular magnetic anisotropy, Antiferromagnetic thin film, Antiferromagnetic proximity effects, Long-range coupling