MAGIC NUMBERS IN THE MAGNETIC-PROPERTIES OF GADOLINIUM CLUSTERS

被引：89
|
作者：
DOUGLASS, DC
BUCHER, JP
BLOOMFIELD, LA
机构：
[1] Department of Physics, University of Virginia, Charlottesville
来源：
PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 11期
关键词：
D O I：
10.1103/PhysRevLett.68.1774
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Gadolinium clusters (N = 11-92) in a molecular beam exhibit dramatic size dependences in their magnetic properties. Two principal behaviors are observed: rigid rotor precession and nutation when the magnetic moment is tightly locked to the lattice by crystal anisotropy, and superparamagnetism when the moment is approximately free. Partially locked behavior is also seen. Magnetic moments of about 3-mu(B) per atom are observed, with Curie temperatures substantially above the bulk value. Moments that remain locked above 300 K may permit ultrahigh density magnetic memory.
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收藏
页码：1774 / 1777
页数：4
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