The effect of spin reorientation transition of antiferromagnetic NiO on the Py magnetic anisotropy in Py/NiO/CoO/MgO(0 0 1)

Journal Article · Fri Mar 23 04:00:00 EDT 2018 · Journal of Magnetism and Magnetic Materials

DOI:https://doi.org/10.1016/j.jmmm.2018.03.055· OSTI ID:1634038

Yang, M. ^[1]; Li, Q. ^[1]; N'Diaye, A. T. ^[2]; Dong, Q. Y. ^[1]; Gao, N. ^[1]; Arenholz, E. ^[2]; Hwang, C. ^[3]; Wu, Y. Z. ^[4]; Qiu, Z. Q. ^[1]

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1. Univ. of California, Berkeley, CA (United States)
2. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
3. Korea Research Institute of Standards and Science, Yuseong, Daejeon (Korea)
4. Fudan Univ., Shanghai (China)

Using X-ray Magnetic Linear Dichroism (XMLD) measurement, we investigate the antiferromagnetic (AFM) NiO spin reorientation transition (SRT) in epitaxial NiO/CoO/MgO(0 0 1) system at room temperature and constructed a complete NiO spin phase diagram. Then utilizing Magneto-Optic Kerr Effect (MOKE) combined with a rotation magnetic field (ROTMOKE), we investigated the effect of NiO SRT on the magnetic anisotropy of a ferromagnetic (FM) Py overlayer in Py/NiO/CoO/MgO(0 0 1) system. We find that the Py coercivity and anisotropy only slightly enhanced for Py on top of out-of-plane NiO spins but greatly enhanced for Py on top of in-plane NiO spins. In conclusion, both the uniaxial and fourfold anisotropies of the Py showed a clear dependence on the NiO spin orientation.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF); National Research Foundation of Korea
• DOE Contract Number: AC02-05CH11231
• OSTI ID: 1634038
• Journal Information: Journal of Magnetism and Magnetic Materials, Journal Name: Journal of Magnetism and Magnetic Materials Vol. 460; ISSN 0304-8853
• Publisher: Elsevier
• Country of Publication: United States
• Language: English