Details

Autor(en) / Beteiligte

• Hajiri, T
• Yoshida, T
• Jaiswal, S
• Filianina, M
• Borie, B
• Ando, H
• Asano, H
• Zabel, H
• Kläui, M

Titel

Magnetization switching behavior with competing anisotropies in epitaxial Co3FeN/MnN exchange-coupled bilayers

Ist Teil von

• Physical review. B, 2016-11, Vol.94 (18)

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2016

Quelle

American Physical Society Journals

Beschreibungen/Notizen

• We report unusual magnetization switching processes and angular-dependent exchange bias effects in fully epitaxial Co3FeN/MnN bilayers, where magnetocrystalline anisotropy and exchange coupling compete, probed by longitudinal and transverse magneto-optic Kerr effect (MOKE) magnetometry. The MOKE loops show multistep jumps corresponding to the nucleation and propagation of 90∘ domain walls in as-grown bilayers. By inducing exchange coupling, we confirm changes of the magnetization switching process due to the unidirectional anisotropy field of the exchange coupling. Taking into account the experimentally obtained values of the fourfold magnetocrystalline anisotropy, the unidirectional anisotropy field, the exchange-coupling constant, and the uniaxial anisotropy including its direction, the calculated angular-dependent exchange bias reproduces the experimental results. These results demonstrate the essential role of the competition between magnetocrystalline anisotropy and exchange coupling for understanding and tailoring exchange-coupling phenomena usable for engineering switching in fully epitaxial bilayers made of tailored materials.