The research in magnetoplasmonics is focalized so far into hybrid nanostructures in which plasmonics and magnetism can coexist and influence each other. Recently we observe the spin-polarization of Au in Au-Fe oxide and AuFe alloy nanoparticles, investigated by X-ray Magnetic Circular Dichroism [3-5]. In this contribution we will discuss the conditions in the nanostructure, in the magnetic properties and in the chemical composition which determine the spin polarization of the Au electrons. We focus on the critical role of the electronic hybridization or the charge transfer mechanisms to induce the spin polarization in plasmonics materials. This work was supported by the EC through FP7-214107-2 project "NANOMAGMA", the Fondazione Cariplo through Project No. 2010-0612 and the FIRB Futuro in Ricerca 2010 Project "NanoPlasMag" (Contract MIUR RBFR10OA10).
Spin polarization in (magneto)plasmonics
Claudio Sangregorio
2015
Abstract
The research in magnetoplasmonics is focalized so far into hybrid nanostructures in which plasmonics and magnetism can coexist and influence each other. Recently we observe the spin-polarization of Au in Au-Fe oxide and AuFe alloy nanoparticles, investigated by X-ray Magnetic Circular Dichroism [3-5]. In this contribution we will discuss the conditions in the nanostructure, in the magnetic properties and in the chemical composition which determine the spin polarization of the Au electrons. We focus on the critical role of the electronic hybridization or the charge transfer mechanisms to induce the spin polarization in plasmonics materials. This work was supported by the EC through FP7-214107-2 project "NANOMAGMA", the Fondazione Cariplo through Project No. 2010-0612 and the FIRB Futuro in Ricerca 2010 Project "NanoPlasMag" (Contract MIUR RBFR10OA10).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
