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Inelastic electron-magnon interaction and spin transfer torque

Balashov, T. 1; Takacs, A. F. 1; Daene, M.; Ernst, A.; Bruno, P.; Wulfhekel, W. 1
1 Physikalisches Institut (PHI), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

A combined experimental and theoretical study on the inelastic transfer of spin momentum between a spin-polarized tunneling current and a ferromagnetic electrode is presented. Using inelastic tunneling spectroscopy across a vacuum gap at 4 K we show that high-energy magnons are efficiently excited in inelastic-scattering events and that the asymmetry of magnon excitation for tunneling into and out of the ferromagnet is proportional to the spin polarization of the tunneling current. We discuss the size of the resulting spin torque and explain the energy distribution of the excited magnons on basis of spin scattering mediated by the itinerant exchange interaction.

DOI: 10.1103/PhysRevB.78.174404
Zitationen: 46
Web of Science
Zitationen: 44
Zitationen: 50
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2008
Sprache Englisch
Identifikator ISSN: 0163-1829
KITopen-ID: 1000053547
Erschienen in Physical Review B
Verlag American Physical Society (APS)
Band 78
Heft 17
Seiten 174404
Nachgewiesen in Scopus
Web of Science
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