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

Xiang Li | Zendy; Sining Dong | Zendy; Xinyu Liu | Zendy; J. K. Furdyna | Zendy; M. Dobrowolska | Zendy

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

Author(s) -

Xiang Li,

Sining Dong,

Xinyu Liu,

J. K. Furdyna,

M. Dobrowolska

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4973201

Subject(s) - condensed matter physics , magnetocrystalline anisotropy , materials science , annealing (glass) , anisotropy , ferromagnetism , magnetic anisotropy , magnetization , magnetic semiconductor , perpendicular , magnetic field , optics , composite material , physics , geometry , mathematics , quantum mechanics

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

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