We present a study of the local magnetic properties of an iron/iron oxide nanostructured granular system by X-ray magnetic circular dichroism. The samples investigated consist of metallic iron (alpha-Fe) nanoparticles embedded in a nanocrystalline oxide matrix composed by both magnetite (Fe3O4) and maghemite (gamma-Fe2O3). Samples were obtained by the inert gas condensation technique. Thanks to the chemical and site selectivity of XMCD, we were able to distinguish the magnetic contributions of the metallic core and of the two oxide phases present. in the matrix and independently study their behaviour as a function of iron particle size, applied magnetic field, sample temperature and magnetization history. (c) 2006 Elsevier B.V. All rights reserved.
X-ray magnetic circular dichroism study of iron/iron oxide granular nanostructures
Boscherini F;
2006
Abstract
We present a study of the local magnetic properties of an iron/iron oxide nanostructured granular system by X-ray magnetic circular dichroism. The samples investigated consist of metallic iron (alpha-Fe) nanoparticles embedded in a nanocrystalline oxide matrix composed by both magnetite (Fe3O4) and maghemite (gamma-Fe2O3). Samples were obtained by the inert gas condensation technique. Thanks to the chemical and site selectivity of XMCD, we were able to distinguish the magnetic contributions of the metallic core and of the two oxide phases present. in the matrix and independently study their behaviour as a function of iron particle size, applied magnetic field, sample temperature and magnetization history. (c) 2006 Elsevier B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
