TY - JOUR
T1 - Critical behavior of perpendicular exchange bias in Ru/Pd/Co/Pt/Cr2O3/Pd stacked films
AU - Shiratsuchi, Yu
AU - Suzuki, Motohiro
AU - Toyoki, Kentaro
AU - Wakatsu, Kohei
AU - Nishimura, Takashi
AU - Nakamura, Tetsuya
AU - Nakatani, Ryoichi
N1 - Funding Information:
XMCD measurements were performed at BL25SU and BL39XU of the SPring-8 synchrotron radiation facility with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No. 2013A1751 and 2013B1267 ). This work is partly supported by Japan Society for the Promotion of Science (JSPS) KAKENHI (Grant Nos. 16H02389 and 19H00825 ).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/4/15
Y1 - 2020/4/15
N2 - The proximity effect in a heavy metal attached to a ferromagnetic (FM) layer results in varied interface magnetism. In this study, we investigated the critical behavior of the perpendicular exchange bias in a Ru/Pd/Co/Pt/Cr2O3/Pd stacked film, with focus on the influence of the Pt spacer layer. The apparent critical exponent β increases with increasing Pt thickness. We discussed the possible mechanism from the perspective of the induced magnetic moment of Pt and interfacial exchange coupling. The former was explored based on X-ray magnetic circular dichroism, which revealed that the magnetic moment of Pt was almost temperature-independent within the studied temperature regime. This suggests that the interfacial FM moment is stable. The latter, i.e., the reduction of the interfacial exchange coupling by the Pt spacer layer, is a possible cause of the increase in β, as theoretically predicted.
AB - The proximity effect in a heavy metal attached to a ferromagnetic (FM) layer results in varied interface magnetism. In this study, we investigated the critical behavior of the perpendicular exchange bias in a Ru/Pd/Co/Pt/Cr2O3/Pd stacked film, with focus on the influence of the Pt spacer layer. The apparent critical exponent β increases with increasing Pt thickness. We discussed the possible mechanism from the perspective of the induced magnetic moment of Pt and interfacial exchange coupling. The former was explored based on X-ray magnetic circular dichroism, which revealed that the magnetic moment of Pt was almost temperature-independent within the studied temperature regime. This suggests that the interfacial FM moment is stable. The latter, i.e., the reduction of the interfacial exchange coupling by the Pt spacer layer, is a possible cause of the increase in β, as theoretically predicted.
KW - Critical behavior
KW - Induced magnetic moment
KW - Magnetic thin film
KW - Perpendicular exchange bias
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U2 - 10.1016/j.physb.2020.412053
DO - 10.1016/j.physb.2020.412053
M3 - Article
AN - SCOPUS:85079042669
SN - 0921-4526
VL - 583
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
M1 - 412053
ER -