Correlation between tetragonal zinc-blende structure and magnetocrystalline anisotropy of MnGa epilayers on GaAs(111)

被引：9

作者：

Arins, A. W. ^{[1
]}

Jurca, H. F. ^{[1
]}

Zarpellon, J. ^{[1
,2
]}

Fabrim, Z. E. ^{[3
]}

Fichtner, P. F. P. ^{[3
]}

Varalda, J. ^{[1
]}

Schreiner, W. H. ^{[1
]}

Mosca, D. H. ^{[1
]}

机构：

[1] Univ Fed Parana, Lab Super & Interfaces, BR-81531990 Curitiba, Parana, Brazil

[2] Univ Estadual Centro Oeste, BR-84500000 Irati, Parana, Brazil

[3] Univ Fed Rio Grande do Sul, Dept Met & Lab Implantacao, BR-91501970 Porto Alegre, RS, Brazil

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2015年 / 381卷

关键词：

X-RAY PHOTOEMISSION; SPECTRA; FILMS;

D O I：

10.1016/j.jmmm.2014.12.068

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

MnGa films of few nanometer thickness with tetragonal zinc-blende (TZB) structure were grown by molecular beam epitaxy on GaAs(111) substrates. These ultrathin films have high magnetization at room temperature with magnetic moment as high as 3.2 mu(B) per formula unit. A strong magnetocrystalline anisotropy energy (MAE) comparable to that reported to delta-MnGa films with body-centered tetragonal (BCT) structure with similar c/a=1.1 is observed. Electronic structure calculations using density functional theory (DFT) reveal a robust ferrimagnetic ground state at room temperature and confirm that zinc-blende structure with tetragonal distortion has a metastable character. The strong MAE is associated with anisotropy of orbital magnetic moment which is described by the symmetry of the spin-polarized charge density along the crystallographic axes. (C) 2014 Elsevier By. All rights reserved.

引用

页码：83 / 88

页数：6

共 18 条

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