Anomalous magnetic polarization effect of Pd and Au nano-particles

✍ Scribed by H. Hori; T. Teranishi; Y. Nakae; Y. Seino; M. Miyake; S. Yamada

• Book ID: 104337903
• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 97 KB
• Volume: 263
• Category: Article
• ISSN: 0375-9601
• DOI: 10.1016/s0375-9601(99)00742-2

✦ Synopsis

The magnetization of Pd and Au nano-particles with a diameter of around 3 nm was measured down to 4.2 K. The data of magnetization of both nano-particles show an unexpectedly large magnetic moment of about 20 spins per particle. This result can not be understood by so-called oddreven electron number effect and Stoner's enhancement model. The result might suggest the existence of some common and characteristic spin correlation mechanism in the nano-particles. The experimental result of size dependence on Pd nano-particles shows existence of a critical size of about 3 nm from a atomic spin correlation region to a metallic spin correlation region.