title: Pt magnetic polarization on Y3Fe5O12 and magnetotransport characteristics.
abstract: Thin Pt films on an yttrium iron garnet (YIG = Y(3)Fe(5)O(12)) show ferromagneticlike transport properties, which may impact the functionality of Pt in spin current detection, but do not provide direct quantitative information on the Pt magnetization. We report magnetic x-ray magnetic circular dichroism measurements of YIG/Pt(1.5 nm) showing an average Pt moment of 0.054 μ(B) at 300 K and 0.076 μ(B) at 20 K. This observation indicates strong proximity effects and induced magnetic ordering in Pt on magnetic insulators and their contribution to the spin-related measurements should not be neglected. The transport characteristics also suggest considerable modifications in the Pt electronic structure due to magnetic ordering.
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: Y M
authors.initials: YM
authors.lastname: Lu
authors.affiliation: Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA.
authors.forename: Y
authors.initials: Y
authors.lastname: Choi
authors.affiliation: Department of Mechanical Engineering and Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas 77204, USA.
authors.forename: C M
authors.initials: CM
authors.lastname: Ortega
authors.affiliation: Department of Physics, Bryn Mawr College, Bryn Mawr, Pennsylvania 19010, USA.
authors.forename: X M
authors.initials: XM
authors.lastname: Cheng
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
authors.forename: J W
authors.initials: JW
authors.lastname: Cai
authors.affiliation: Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA.
authors.forename: S Y
authors.initials: SY
authors.lastname: Huang
authors.affiliation: Department of Mechanical Engineering and Texas Center for Superconductivity (TcSUH), University of Houston, Houston, Texas 77204, USA.
authors.forename: L
authors.initials: L
authors.lastname: Sun
authors.affiliation: Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA.
authors.forename: C L
authors.initials: CL
authors.lastname: Chien