Noncollinear Magnetism in Ultrathin Films with Strong Spin-Orbit Coupling from Ab Initio

被引：3
|
作者：
Boettcher, D. [1 ,2 ]
Ernst, A. [1 ]
Henk, J. [1 ]
机构：
[1] Max Planck Inst Mikrostrukturphys, D-06120 Halle, Saale, Germany
[2] Univ Halle Wittenberg, Inst Phys, D-06120 Halle, Saale, Germany
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2012年 / 12卷 / 09期
关键词：
Dzyaloshinskii-Moryia Interaction; Ultrathin Films; Magnetic Ground State Properties; MAGNETOCRYSTALLINE ANISOTROPY;
D O I：
10.1166/jnn.2012.6555
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Fe and Pt are paradigms for ferromagnetism and strong spin-orbit coupling, respectively. Their combination in an ultrathin Fe film on a Pt(111) substrate is thus expected to modify the magnetic structures. We report on a theoretical investigation of a monolayer of Fe on Pt(111), using a generalized Heisenberg model that includes the complete spin interaction matrices I-ij computed from first principles. We find a noncollinear periodic configuration that is strongly determined by the Dzyaloshinskii-Moriya interaction. Taking into account a magnetic field to mimic recent experiments, this noncollinear structure solves the disagreement between the experimental magnetization and the average magnetization for a ferromagnetic system. The critical temperature decreases from 670 K to 590 K due to spin-orbit coupling.
引用
收藏
页码：7516 / 7519
页数：4
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