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Angle-dependent magnetotransport in cubic and tetragonal ferromagnets : Application to (001)- and (113)A-oriented (Ga,Mn)As

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2006

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Limmer, Wolfgang
Glunk, Michael
Daeubler, Joachim
Hummel, Thomas
Schoch, Wladimir
Sauer, Rolf
Bihler, Christoph
Huebl, Hans
Brandt, Martin S.

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https://doi.org/10.1103/PhysRevB.74.205205
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http://arxiv.org/abs/cond-mat/0607679

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Physical Review B. American Physical Society (APS). 2006, 74(20), 205205. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.74.205205

Zusammenfassung

General expressions for the longitudinal and transverse resistivities of single-crystalline cubic and tetragonal ferromagnets are derived from a series expansion of the resistivity tensor with respect to the magnetization orientation. They are applied to strained (Ga,Mn)As films, grown on (001)- and (113)A-oriented GaAs substrates, where the resistivities are theoretically and experimentally studied for magnetic fields rotated within various planes parallel and perpendicular to the sample surface. We are able to model the measured angular dependences of the resistivities within the framework of a single ferromagnetic domain, calculating the field-dependent orientation of the magnetization by numerically minimizing the free-enthalpy density. Angle-dependent magnetotransport measurements are shown to be a powerful tool for probing magnetic anisotropy. The anisotropy parameters of the (Ga,Mn)As films inferred from the magnetotransport measurements agree with those obtained by ferromagnetic resonance measurements within a factor of 2.

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ISO 690LIMMER, Wolfgang, Michael GLUNK, Joachim DAEUBLER, Thomas HUMMEL, Wladimir SCHOCH, Rolf SAUER, Christoph BIHLER, Hans HUEBL, Martin S. BRANDT, Sebastian T. B. GOENNENWEIN, 2006. Angle-dependent magnetotransport in cubic and tetragonal ferromagnets : Application to (001)- and (113)A-oriented (Ga,Mn)As. In: Physical Review B. American Physical Society (APS). 2006, 74(20), 205205. ISSN 2469-9950. eISSN 2469-9969. Available under: doi: 10.1103/PhysRevB.74.205205
BibTex
@article{Limmer2006-07-26T11:56:47ZAngle-52744,
  year={2006},
  doi={10.1103/PhysRevB.74.205205},
  title={Angle-dependent magnetotransport in cubic and tetragonal ferromagnets : Application to (001)- and (113)A-oriented (Ga,Mn)As},
  number={20},
  volume={74},
  issn={2469-9950},
  journal={Physical Review B},
  author={Limmer, Wolfgang and Glunk, Michael and Daeubler, Joachim and Hummel, Thomas and Schoch, Wladimir and Sauer, Rolf and Bihler, Christoph and Huebl, Hans and Brandt, Martin S. and Goennenwein, Sebastian T. B.},
  note={Article Number: 205205}
}
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