TY - JOUR
T1 - Direct observation of magnetic process in quasi-antiferromagnet by high-resolution Kerr microscopy
AU - Hashimoto, Naoki
AU - Horiike, Shuu
AU - Kurokawa, Yuichiro
AU - Tanaka, Terumitsu
AU - Chang, Po Chun
AU - Lin, Wen Chin
AU - Yuasa, Hiromi
N1 - Funding Information:
This study was supported by Japan Society for the Promotion of Science KAKENHI (Grant No. JP19K04471), Sumitomo Foundation, and Center for Spintronics Research Network (Osaka).
Publisher Copyright:
© 2021 The Japan Society of Applied Physics.
PY - 2021/5
Y1 - 2021/5
N2 - We investigated the relationship between the magnetic hysteresis loop and domain structure modulation of an artificial material, a quasi-antiferromagnet (AFM) with domains of alternating antiparallel magnetization fabricated by a strong 90° magnetic coupling between two ferromagnetic layers through an Fe-O thin layer. High-resolution Kerr images show simultaneous magnetization rotation, nucleation, and growth of stripe-type domains with maintained magnetization along the longitudinal direction of the domain. The nucleation and growth were dominant in the magnetization reversal of the quasi-AFM. By fitting not only the magnetization curve but also the domain structure to the Landau-Lifshitz-Gilbert equation, the 90° coupling coefficients were properly obtained, which enables us to design the magnetic structure of the quasi-AFM.
AB - We investigated the relationship between the magnetic hysteresis loop and domain structure modulation of an artificial material, a quasi-antiferromagnet (AFM) with domains of alternating antiparallel magnetization fabricated by a strong 90° magnetic coupling between two ferromagnetic layers through an Fe-O thin layer. High-resolution Kerr images show simultaneous magnetization rotation, nucleation, and growth of stripe-type domains with maintained magnetization along the longitudinal direction of the domain. The nucleation and growth were dominant in the magnetization reversal of the quasi-AFM. By fitting not only the magnetization curve but also the domain structure to the Landau-Lifshitz-Gilbert equation, the 90° coupling coefficients were properly obtained, which enables us to design the magnetic structure of the quasi-AFM.
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U2 - 10.35848/1347-4065/abe5c2
DO - 10.35848/1347-4065/abe5c2
M3 - Article
AN - SCOPUS:85102446272
SN - 0021-4922
VL - 60
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - SB
M1 - SBBI05
ER -