Anomalous magnetic polarization effect of Pd and Au nano-particles

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 odd/even electron number...

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Bibliographic Details
Published in:Physics letters. A 1999-12, Vol.263 (4), p.406-410
Main Authors: Hori, H., Teranishi, T., Nakae, Y., Seino, Y., Miyake, M., Yamada, S.
Format: Article
Language:English
Subjects:
Magic number
Magnetization
Nano-particles
Odd/even number effect
Spin correlation
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Summary: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 odd/even 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.
ISSN:0375-9601
1873-2429
DOI:10.1016/S0375-9601(99)00742-2