Diameter dependence of ferromagnetic spin moment in Au nanocrystals

被引：119

作者：

Hori, H ^{[1
]}

Yamamoto, Y ^{[1
]}

Iwamoto, T ^{[1
]}

Miura, T ^{[1
]}

Teranishi, T ^{[1
]}

Miyake, M ^{[1
]}

机构：

[1] JAIST, Sch Mat Sci, Tatsunokuchi, Ishikawa 9231292, Japan

来源：

PHYSICAL REVIEW B | 2004年 / 69卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.69.174411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Au nanoparticles exhibit ferromagnetic spin polarization and show diameter dependence in magnetization. The magnetic moment per Au atom in the particle attains its maximum value at a diameter of about 3 nm in the magnetization-diameter curve. Because Au metal is a typical diamagnetic material, its ferromagnetic polarization mechanism is thought to be quite different from the ferromagnetism observed in transition metals. The size effect strongly suggests the existence of some spin-correlation effect at the nanoscale. The so-called "Fermi hole effect" is the most probable one given in the free-electron gas system. Ferromagnetism in Au nanoparticles is discussed using this model.

引用

页码：174411 / 1

页数：5

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