Size dependence of the magnetic moments of exposed nanoscale iron particles

被引：47

作者：

Edmonds, KW

Binns, C ^{[1
]}

Baker, SH

Maher, MJ

Thornton, SC

Tjernberg, O

Brookes, NB

机构：

[1] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2001年 / 231卷 / 01期

关键词：

nanoscale magnetism;

D O I：

10.1016/S0304-8853(00)01349-4

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The magnetic moments in exposed, mass-selected, nanoscale Fe clusters in the size range 1.89-2.20 nm (300-475 atoms), deposited onto graphic in situ have been measured by X-ray magnetic circular dichroism. The smallest clusters possess moments that are enhanced by around 4% for m(spin) and 80% for m(orb) and decrease towards the bulk value with increasing size. The larger clusters show an in-plane anisotropy that is consistent with the anisotropy in the orbital moment. The smallest clusters are, within experimental error, magnetically isotropic. The anisotropy constant in the 475-atom clusters is significantly higher than the bulk value. (C) 2001 Elsevier Science B.V. All rights reserved.

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页码：113 / 119

页数：7

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