Microscopic Investigation into the Electric Field Effect on Proximity-Induced Magnetism in Pt

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Electric field effects on magnetism in metals have attracted widespread attention, but the microscopic mechanism is still controversial. We experimentally show the relevancy between the electric field effect on magnetism and on the electronic structure in Pt in a ferromagnetic state using element-specific measurements: x-ray magnetic circular dichroism (XMCD) and x-ray absorption spectroscopy (XAS). Electric fields are applied to the surface of ultrathin metallic Pt, in which a magnetic moment is induced by the ferromagnetic proximity effect resulting from a Co underlayer. XMCD and XAS measurements performed under the application of electric fields reveal that both the spin and orbital magnetic moments of Pt atoms are electrically modulated, which can be explained not only by the electric-field-induced shift of the Fermi level but also by the change in the orbital hybridizations.
Publisher
AMER PHYSICAL SOC
Issue Date
2018-04
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW LETTERS, v.120, no.15, pp.157203

ISSN
0031-9007
DOI
10.1103/PhysRevLett.120.157203
URI
http://hdl.handle.net/10203/244915
Appears in Collection
PH-Journal Papers(저널논문)
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