Magnetic properties of nano-particles of Au, Pd and Pd/Ni alloys

被引：19

作者：

Hori, H ^{[1
]}

Teranishi, T ^{[1
]}

Taki, M ^{[1
]}

Yamada, S ^{[1
]}

Miyake, M ^{[1
]}

Yamamoto, Y ^{[1
]}

机构：

[1] Japan Adv Inst Sci & Technol, Sch Mat Sci, Tatsunokuchi, Ishikawa 9231292, Japan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2001年 / 226卷

关键词：

nanoparticles; quantum size effect; superparamagnetism; spin correlations;

D O I：

10.1016/S0304-8853(00)01393-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Well-characterized nanometer sized metal particles (nano-particle) with quite narrow diameter distribution have been synthesized by chemical method and their magnetic properties were investigated systematically using SQUID magnetometer and ESR spectrometer. Au and Pd nano-particles display the ferromagnetism contrary to the para- and diamagnetism in their bulk state. Moreover, the magnetization of Pd particles has been measured as a function of particle diameter and showed threshold size of about 3 nm. This result suggests the existence of a critical size changing from atomic to metallic spin correlation. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：1910 / 1911

页数：2

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