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, morb/mspin, 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

• Cozzoli Pantaleo Davide

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

34

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

Non Disponibile

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile