Abstract

We report on the unprecedented direct observation of spin-polarization transfer across colloidal magneto-plasmonic Au@Fe-oxide core@shell nanocrystal heterostructures. A magnetic moment is induced into the Au domain when the magnetic shell contains a reduced Fe-oxide phase in direct contact with the noble metal. An increased hole density in the Au states suggested occurrence of a charge-transfer process concomitant to the magnetization transfer. The angular to spin magnetic moment ratio, m(orb)/m(spin) for the Au 5d states, which was found to be equal to 0.38, appeared to be unusually large when compared to previous findings. A mechanism relying on direct hybridization between the Au and Fe states at the core/shell interface is proposed to account for the observed transfer of the magnetic moment.

Autore Pugliese

• Carlino Elvio

Tutti gli autori

• F. Pineider; C.de Julián Fernández; V. Videtta; E. Carlino; A. al Hourani; F. Wilhelm; A. Rogalev; P. D. Cozzoli; P. Ghigna; C. Sangregorio

Titolo volume/Rivista

ACS nano

Anno di pubblicazione

2013

ISSN

1936-0851

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

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Numero di citazioni Scopus

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Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

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