TY - JOUR
T1 - Interfacial exchange coupling between transition metals and Mn1.5Ga studied by X-ray magnetic circular dichroism
AU - Okabayashi, Jun
AU - Suzuki, Kazuya Z.
AU - Mizukami, Shigemi
N1 - Funding Information:
The authors thank Professor Masafumi Shirai for the fruitful discussion. This work was partly supported by the QPI program, the Asahi Glass Foundation. This work was partly supported by a Grant-in-Aid for Scientific Research (B) (Grant No. 15H03562) and (S) (Grant Nos 25220604, 16H06332) from the Japan Society for the Promotion of Science and Center for Spintronics Research Network (CSRN) of Japan. The synchrotron radiation experiments were performed with the approval of the Photon Factory Program Advisory Committee, KEK (Nos. 2015G090 and 2017G060).
Publisher Copyright:
© 2018 Elsevier B.V.
Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2018/8/15
Y1 - 2018/8/15
N2 - We investigated the element-specific magnetic properties at interfaces of Fe (1 nm)/Mn1.5Ga and Co (1 nm)/Mn1.5Ga using X-ray magnetic circular dichroism (XMCD). We found that the spins in the Fe and Co layers were coupled with and parallel to those in the Mn1.5Ga under the as-grown conditions, while the post-annealing at 350 °C changed the interface magnetic coupling to antiferromagnetic in Co. The element-specific hysteresis curves at each XMCD absorption edge revealed large coercive fields in Fe and Co through the exchange coupling with Mn1.5Ga. After the annealing process, XMCD spectral line shapes indicate that the interfacial reactions promote the formation of Mn2CoGa-like secondary alloys, which influences the performance of tunnel magnetoresistance using the interfaces between transition metals and MnGa.
AB - We investigated the element-specific magnetic properties at interfaces of Fe (1 nm)/Mn1.5Ga and Co (1 nm)/Mn1.5Ga using X-ray magnetic circular dichroism (XMCD). We found that the spins in the Fe and Co layers were coupled with and parallel to those in the Mn1.5Ga under the as-grown conditions, while the post-annealing at 350 °C changed the interface magnetic coupling to antiferromagnetic in Co. The element-specific hysteresis curves at each XMCD absorption edge revealed large coercive fields in Fe and Co through the exchange coupling with Mn1.5Ga. After the annealing process, XMCD spectral line shapes indicate that the interfacial reactions promote the formation of Mn2CoGa-like secondary alloys, which influences the performance of tunnel magnetoresistance using the interfaces between transition metals and MnGa.
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U2 - 10.1016/j.jmmm.2018.03.060
DO - 10.1016/j.jmmm.2018.03.060
M3 - Article
AN - SCOPUS:85045727855
VL - 460
SP - 418
EP - 423
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
ER -