Surface ferromagnetism of Pd fine particles

被引：185

作者：

Shinohara, T

Sato, T

Taniyama, T

机构：

[1] Keio Univ, Fac Sci & Technol, Dept Appl Phys & Physicoinformat, Yokohama, Kanagawa 2238522, Japan

[2] Tokyo Inst Technol, Dept Innovat & Engn Mat, Yokohama, Kanagawa 2268502, Japan

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.91.197201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report clear evidence of the ferromagnetism of gas-evaporated Pd fine particles with a clean surface. The clean Pd particle is found to have a magnetic heterostructure: the surface of the particle is ferromagnetic and the rest is paramagnetic. The size dependence of the magnetic saturation component reveals that the ferromagnetic ordering occurs only on (100) facets of the particle and that the topmost two to five layers from the surface contribute to the ferromagnetism with a magnetic moment of (0.75+/-0.31)mu(B)/atom.

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页码：1 / 197201

页数：4

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