High Curie temperature and possible canted magnetism in free Gd clusters

被引：45

作者：

Gerion, D ^{[1
]}

Hirt, A ^{[1
]}

Châtelain, A ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Phys Expt, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 1999年 / 83卷 / 03期

关键词：

D O I：

10.1103/PhysRevLett.83.532

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The magnetic properties of free Gd-N clusters (N = 13, 21, and 22) have been measured between 90 and 600 K in a Stern-Gerlach experiment. Gd-13 and Gd-21 are found to be superparamagnetic (SP) whereas Gd-22 is not. Within the SP model, the magnetic moment per atom at 100 K is 5.4 mu(B) for Gd-13 and 5 mu(B) for Gd-21, lower than the bulk value, 7.55 mu(B). We measure Curie temperatures of 420 +/- 20 K for Gd-21 and over 500 K for Gd-13, significantly higher than 293 K, the bulk value. A canted magnetic moment model is compatible with the experimental data.

引用

页码：532 / 535

页数：4

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