Micromagnetic properties of MnAs(0001)∕GaAs(111) epitaxial films

Micromagnetic properties of MnAs(0001)∕GaAs(111) epitaxial films
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MnAs(0001)∕GaAs(111)外延薄膜的微磁性能

DOI:
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发表时间:
2006
期刊:
影响因子:
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通讯作者:
K. Ploog
K. Ploog
中科院分区:
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文献类型:
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作者:
R. Engel;T. Hesjedal;D. Schaadt;L. Däweritz;K. Ploog

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研究了生长在(111)B取向的GaAs面上的MNAs薄膜的微磁性。与生长在(001)表面上的薄膜相比,这些薄膜呈现出完全不同的磁区图案,因为六方晶胞的c轴垂直于表面。在一级相变过程中,铁磁性α-MNAs形成了由β-MNAs隔开的准六方区域网络。我们给出了基于成像和模拟的微磁特性的分析。我们观察到闭合区域要么呈现为涡旋状状态,要么呈现为条状结构。
The micromagnetic properties of MnAs thin films grown on the (111)B-oriented GaAs surface have been investigated. Compared to films grown on (001) surfaces, these films exhibit completely different domain patterns, as the c axis of the hexagonal unit cell is oriented normal to the surface. In the course of the first order phase transition, ferromagnetic α-MnAs forms a network of quasihexagonal areas separated by β-MnAs. We present an analysis of the micromagnetic properties based on imaging and simulations. We observe closure domains that either appear as a vortex-like state or a stripe structure.