Micromagnetic properties of epitaxial MnAs films on GaAs surfaces

被引：1
|
作者：
Hesjedal, Thorsten [1 ]
Engel-Herbert, Roman [1 ]
Schaadt, Daniel M. [2 ]
Ploog, Klaus H. [2 ]
机构：
[1] Univ Waterloo, Magnet Mat Lab, Waterloo, ON N2L 3G1, Canada
[2] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany
来源：
PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 4, NO 5 | 2007年 / 4卷 / 05期
关键词：
D O I：
10.1002/pssc.200674270
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
We present a systematic study of the micromagnetic properties of MnAs deposited by molecular-beam epitaxy on GaAs(001) and GaAs(111)B surfaces. In epitaxial MnAs films, the strain state in MnAs-on-GaAs(001) (anisotropic) and MnAs-on-GaAs(111)B (isotropic) has a strong influence on the magnetostructural phase transition and thus the micromagnetic properties. The ferromagnetic alpha and the beta phase coexist over a wide temperature range exhibiting self-organized, magnetically coupled nanostructures. Independent of the substrate orientation, magnetic flux-closure domain patterns are formed in the basal plane of MnAs. The spatial distribution of the phases in equilibrium (stripes and quasi-hexagonal islands, respectively) stabilizes various magnetic states, which were found experimentally and confirmed by micromagnetic simulations. (c) 2007 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
收藏
页码：1763 / +
页数：2
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