Temperature dependence of the magnetization in Fe islands on W(110):: evidence for spin-wave quantization -: art. no. 47

被引：28
|
作者：
Senz, V
Röhlsberger, R
Bansmann, J
Leupold, O
Meiwes-Broer, KH
机构：
[1] Univ Rostock, Fachbereich Phys, D-18051 Rostock, Germany
[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France
来源：
NEW JOURNAL OF PHYSICS | 2003年 / 5卷
关键词：
D O I：
10.1088/1367-2630/5/1/347
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have measured the temperature dependence of the magnetic hyperfine field in Ag-coated Fe(110) islands on W(110) between 4 and 300 K using nuclear resonant scattering of synchrotron radiation. The decay of the spontaneous magnetization of the islands with increasing temperature differs distinctly from the bulk characteristics and is not described by a simple Bloch's T-3/2 law. The deviation is attributed to quantization of spin-waves as a result of geometric confinement in the islands. The data can be explained assuming an effective energy gap in the spin-wave spectrum of DeltaE = 6.7 +/- 1 meV.
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页数：9
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