Temperature-dependent shape anisotropy in patterned ferromagnetic (Ga,Mn)As films with low Mn concentration

Temperature-dependent shape anisotropy in patterned ferromagnetic (Ga,Mn)As films with low Mn concentration

We discuss magnetic properties of lithographically patterned nanoscale stripes of dilute ferromagnetic semiconductor (Ga,Mn)As aligned with [110] crystallographic direction, i.e., perpendicular to the easy axis of uniaxial magnetocrystalline anisotropy of this material. We find that at temperatures...

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Main Authors: Xiang Li, Sining Dong, Xinyu Liu, Jacek K. Furdyna, Margaret Dobrowolska
Format: Article
Language:English
Published: AIP Publishing LLC 2017-05-01
Series:AIP Advances
Online Access:http://dx.doi.org/10.1063/1.4973201
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spelling doaj-dcbc903d68c74384ac2e2af758bd3c552020-11-25T00:40:18ZengAIP Publishing LLCAIP Advances2158-32262017-05-0175055810055810-510.1063/1.4973201023791ADVTemperature-dependent shape anisotropy in patterned ferromagnetic (Ga,Mn)As films with low Mn concentrationXiang Li0Sining Dong1Xinyu Liu2Jacek K. Furdyna3Margaret Dobrowolska4Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USADepartment of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USADepartment of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USADepartment of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USADepartment of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USAWe discuss magnetic properties of lithographically patterned nanoscale stripes of dilute ferromagnetic semiconductor (Ga,Mn)As aligned with [110] crystallographic direction, i.e., perpendicular to the easy axis of uniaxial magnetocrystalline anisotropy of this material. We find that at temperatures where uniaxial anisotropy becomes dominant, shape-induced effects strongly compete with this intrinsic property, tending to align the total magnetization along the stripe direction. The present study revealed, however, that low-temperature annealing of the stripes markedly reduces such shape-induced effects. This effect of annealing is not presently understood, and will require further detailed study.http://dx.doi.org/10.1063/1.4973201
collection DOAJ
language English
format Article
sources DOAJ
author Xiang Li
Sining Dong
Xinyu Liu
Jacek K. Furdyna
Margaret Dobrowolska
spellingShingle Xiang Li
Sining Dong
Xinyu Liu
Jacek K. Furdyna
Margaret Dobrowolska
Temperature-dependent shape anisotropy in patterned ferromagnetic (Ga,Mn)As films with low Mn concentration
AIP Advances
author_facet Xiang Li
Sining Dong
Xinyu Liu
Jacek K. Furdyna
Margaret Dobrowolska
author_sort Xiang Li
title Temperature-dependent shape anisotropy in patterned ferromagnetic (Ga,Mn)As films with low Mn concentration
title_short Temperature-dependent shape anisotropy in patterned ferromagnetic (Ga,Mn)As films with low Mn concentration
title_full Temperature-dependent shape anisotropy in patterned ferromagnetic (Ga,Mn)As films with low Mn concentration
title_fullStr Temperature-dependent shape anisotropy in patterned ferromagnetic (Ga,Mn)As films with low Mn concentration
title_full_unstemmed Temperature-dependent shape anisotropy in patterned ferromagnetic (Ga,Mn)As films with low Mn concentration
title_sort temperature-dependent shape anisotropy in patterned ferromagnetic (ga,mn)as films with low mn concentration
publisher AIP Publishing LLC
series AIP Advances
issn 2158-3226
publishDate 2017-05-01
description We discuss magnetic properties of lithographically patterned nanoscale stripes of dilute ferromagnetic semiconductor (Ga,Mn)As aligned with [110] crystallographic direction, i.e., perpendicular to the easy axis of uniaxial magnetocrystalline anisotropy of this material. We find that at temperatures where uniaxial anisotropy becomes dominant, shape-induced effects strongly compete with this intrinsic property, tending to align the total magnetization along the stripe direction. The present study revealed, however, that low-temperature annealing of the stripes markedly reduces such shape-induced effects. This effect of annealing is not presently understood, and will require further detailed study.
url http://dx.doi.org/10.1063/1.4973201
work_keys_str_mv AT xiangli temperaturedependentshapeanisotropyinpatternedferromagneticgamnasfilmswithlowmnconcentration
AT siningdong temperaturedependentshapeanisotropyinpatternedferromagneticgamnasfilmswithlowmnconcentration
AT xinyuliu temperaturedependentshapeanisotropyinpatternedferromagneticgamnasfilmswithlowmnconcentration
AT jacekkfurdyna temperaturedependentshapeanisotropyinpatternedferromagneticgamnasfilmswithlowmnconcentration
AT margaretdobrowolska temperaturedependentshapeanisotropyinpatternedferromagneticgamnasfilmswithlowmnconcentration
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