2024-03-29T10:42:49Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00028702
2023-01-16T04:21:40Z
320:321:322
45° sign switching of effective exchange bias due to competing anisotropies in fully epitaxial Co3FeN/MnN bilayers
Hajiri, T
94236
Yoshida, T
94237
Filianina, M
94238
Jaiswal, S
94239
Borie, B
94240
Asano, H
94241
Zabel, H
94242
Kläui, M
94243
exchange coupling
magnetization switching process
magnetic anisotropy
We report an unusual angular-dependent exchange bias effect in ferromagnet/antiferromagnet bilayers, where both ferromagnet and antiferromagnet are epitaxially grown. Numerical model calculations predict an approximately 45° period for the sign switching of the exchange-bias field, depending on the ratio between magnetocrystalline anisotropy and exchange-coupling constant. The switching of the sign is indicative of a competition between a fourfold magnetocrystalline anisotropy of the ferromagnet and a unidirectional anisotropy field of the exchange coupling. This predicted unusual angular-dependent exchange bias and its magnetization switching process are confirmed by measurements on fully epitaxial Co3FeN/MnN bilayers by longitudinal and transverse magneto-optic Kerr effect magnetometry. These results provide a deeper understanding of the exchange coupling phenomena in fully epitaxial bilayers with tailored materials and open up a complex switching energy landscape engineering by anisotropies.
journal article
IOP publishing
2018-01-10
application/pdf
Journal of Physics: Condensed Matter
1
30
015806
0953-8984
https://nagoya.repo.nii.ac.jp/record/28702/files/MOKE_Hajiri_JPCM_author_version.pdf
eng
https://doi.org/10.1088/1361-648X/aa9ba7
This is an author-created, un-copyedited version of an article published in {Journal of Physics: Condensed Matter}. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at {https://doi.org/10.1088/1361-648X/aa9ba7}. “This Accepted Manuscript is available for reuse under a CC BY-NC-ND 3.0 licence after the 12 month embargo period provided that all the terms of the licence are adhered to”