Anomalous spin polarization in Pd and Au nano-particles

摘要

The magnetization of Pd and Au nano-particles was measured at liquid He temperature. In order to measure the magnetization by SQUID, a chemical generation method of well-conformed nano-particles has been developed. The data of magnetization of both Pd and Au nano-particles show unexpectedly large magnetic moment of about 20 spins per particle. This result cannot be understood by the former models and suggests the existence of some special spin correlation in the nano-particles. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 4]