Kerr rotation in Cu, Ag, and Au driven by spin accumulation and spin-orbit coupling

Title
Kerr rotation in Cu, Ag, and Au driven by spin accumulation and spin-orbit coupling
Authors
최경민David G. Cahill
Keywords
spin accumulation; spin-orbit coupling
Issue Date
2014-12
Publisher
Physical review B, Condensed matter and materials physics
Citation
VOL 90, NO 214432
Abstract
We measure transient spin accumulation in Cu, Ag, and Au by time-resolved magneto-optical Kerr effect. The transient spin current is generated by ultrafast demagnetization of a ferromagnetic [Co/Pt] layer, and spin accumulates in an adjacent normal metal, Cu, Ag, or Au by spin diffusion. The magnitude of the Kerr rotation is described by an off-diagonal conductivity tensor that is proportional to spin accumulation and spin-orbit coupling. From comparisons between observed Kerr rotations and calculated spin accumulations, we determine the strength of spin-orbit coupling of conduction electrons in Cu, Ag, and Au to be 0.02, 0.01, and 0.12eV, respectively.
URI
http://pubs.kist.re.kr/handle/201004/58455
ISSN
10980121
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KIST Publication > Article
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