Noncollinear magnetism of Cr and Mn monolayers on Cu(111)

被引:22
作者
Kurz, P [1 ]
Bihlmayer, G [1 ]
Blügel, S [1 ]
机构
[1] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany
关键词
D O I
10.1063/1.372622
中图分类号
O59 [应用物理学];
学科分类号
摘要
Cr and Mn monolayers on a triangular lattice are prototypical examples of frustrated spin systems in two dimensions. Collinear and noncollinear magnetic structures of these monolayers on Cu(111) substrate are investigated on the basis of first-principles total-energy calculations using the full-potential linearized augmented plane-wave method extended by the vector spin-density description for the interstitial and vacuum region. The search for the magnetic minimum-energy configurations included unit cells with one, two, and three atoms. For Cr the minimal energy was found for a 120 degrees spin configuration in a (root 3x root 3)R30 degrees unit cell, which is in agreement with the classical nearest-neighbor Heisenberg model with antiferromagnetic exchange interaction. The same behavior is expected for Mn, but a surprising result was found: the minimal energy was found for a collinear row-wise antiferromagnetic structure. (C) 2000 American Institute of Physics. [S0021-8979(00)51008-1].
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收藏
页码:6101 / 6103
页数:3
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