title: Induced perpendicular magnetization in a Cu layer inserted between Co and Pt layers revealed by x-ray magnetic circular dichroism.
abstract: We used x-ray absorption spectroscopy and x-ray magnetic circular dichroism to investigate the effects of inserting Cu into Co/Pt interfaces, and found that a 0.4-nm-thick inserted Cu layer showed perpendicularly magnetized properties induced by the proximity effect through the Co and Pt layers. The dependence of the magnetic properties on the thickness of the Cu layers showed that the proximity effects between Co and Pt with perpendicular magnetic anisotropy can be prevented by the insertion of a Cu layer with a nominal threshold thickness of 0.7 nm. Element-specific magnetization curves were also obtained, demonstrating that the out-of-plane magnetization is induced in the Cu layers of the Co/Cu/Pt structures.
authors.affiliation: Research Center for Spectrochemistry, The University of Tokyo, 113-0033 Tokyo, Japan.
authors.forename: Jun
authors.initials: J
authors.lastname: Okabayashi
authors.affiliation: Department of Applied Physics, The University of Tokyo, 113-8656 Tokyo, Japan.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Koyama
authors.affiliation: Japan Synchrotron Radiation Research Institute (JASRI), Kouto, Sayo, Hyogo 679-5198, Japan.
authors.forename: Motohiro
authors.initials: M
authors.lastname: Suzuki
authors.affiliation: Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan.|Center for Spintronics Research Network, Tohoku University, Sendai 980-8577, Japan.
authors.forename: Masahito
authors.initials: M
authors.lastname: Tsujikawa
authors.affiliation: Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan.|Center for Spintronics Research Network, Tohoku University, Sendai 980-8577, Japan.
authors.forename: Masafumi
authors.initials: M
authors.lastname: Shirai
authors.affiliation: Department of Applied Physics, The University of Tokyo, 113-8656 Tokyo, Japan.
authors.forename: Daichi
authors.initials: D
authors.lastname: Chiba