Direct determination of interfacial magnetic moments with a magnetic phase transition in Co nanoclusters on Au(111)

被引：114

作者：

Koide, T ^{[1
]}

Miyauchi, H

Okamoto, J

Shidara, T

Fujimori, A

Fukutani, H

Amemiya, K

Takeshita, H

Yuasa, S

Katayama, T

Suzuki, Y

机构：

[1] High Energy Accelerator Res Org, IMSS, Photon Factory, Tsukuba, Ibaraki 3050801, Japan

[2] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[3] Univ Tsukuba, Inst Phys, Tsukuba, Ibaraki 3050006, Japan

[4] Univ Tokyo, Res Ctr Spectrochem, Bunkyo Ku, Tokyo 1130033, Japan

[5] Natl Inst Adv Ind Sci Technol, JRCAT, Tsukuba, Ibaraki 3058568, Japan

[6] Toho Univ, Dept Phys, Chiba 2740072, Japan

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.87.257201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The spin, in-plane and out-of-plane orbital and magnetic dipole moments of almost purely interfacial Co atoms were directly determined for Au/2-monolayer Co nanoclusters/Au(111) by angle-dependent magnetic circular x-ray dichroism (MCXD) measurements. The field-and temperature-dependent MCXD evidences a ferromagnetic(FM)-to-super-paramagnetic phase transition in single-domain clusters with decreasing size. The interfacial moments are remarkably enhanced as compared with bulk values, verifying theoretical predictions. The FM clusters show strong perpendicular magnetic anisotropy, providing promise of applications for nanoscale magnetic bits.

引用

页码：257201 / 1

页数：4

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