title: Asymmetric magnetic proximity effect in a Pd/Co/Pd trilayer system.
abstract: In spintronic devices consisting of ferromagnetic/nonmagnetic systems, the ferromagnet-induced magnetic moment in the adjacent nonmagnetic material significantly influences the spin transport properties. In this study, such magnetic proximity effect in a Pd/Co/Pd trilayer system is investigated by x-ray magnetic circular dichroism and x-ray resonant magnetic reflectivity, which enables magnetic characterizations with element and depth resolution. We observe that the total Pd magnetic moments induced at the top Co/Pd interface are significantly larger than the Pd moments at the bottom Pd/Co interface, whereas transmission electron microscopy and reflectivity analysis indicate the two interfaces are nearly identical structurally. Such asymmetry in magnetic proximity effects could be important for understanding spin transport characteristics in ferromagnetic/nonmagnetic systems and its potential application to spin devices.
authors.affiliation: Department of Physics, Soongsil University, Seoul 06978, Republic of Korea.|Center for Spintronics, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.
authors.forename: Dong-Ok
authors.initials: DO
authors.lastname: Kim
authors.affiliation: Center for Spintronics, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.|Department of Physics, Sookmyung Women's University, Seoul 04130, Republic of Korea.
authors.forename: Kyung Mee
authors.initials: KM
authors.lastname: Song
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Yongseong
authors.initials: Y
authors.lastname: Choi
authors.affiliation: Center for Spintronics, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.
authors.forename: Byoung-Chul
authors.initials: BC
authors.lastname: Min
authors.affiliation: Department of Physics, Sookmyung Women's University, Seoul 04130, Republic of Korea.
authors.forename: Jae-Sung
authors.initials: JS
authors.lastname: Kim
authors.affiliation: Center for Spintronics, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.
authors.forename: Jun Woo
authors.initials: JW
authors.lastname: Choi
authors.affiliation: Department of Physics, Soongsil University, Seoul 06978, Republic of Korea.|Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Dong Ryeol
authors.initials: DR
authors.lastname: Lee