Semiclassical electronic transport in MnAs thin films

Helman, C.; Milano, J.; Steren, L. B.; Llois, A.M.

doi:10.1016/j.jmmm.2008.02.134

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…2(d). These MR features of MnAs were already presented in [26][27][28], showing mainly the same results, and will not be further discussed in the present work.…”

Section: Samples and Experimentssupporting

confidence: 80%

Anomalous Hall effect in MnAs: Intrinsic contribution due to Berry curvature

Helman

Camjayi²,

Islam

et al. 2021

Phys. Rev. B

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We present an experimental and theoretical study of the anomalous Hall effect (AHE) in MnAs epilayers grown over GaAs, with the aim to identify the intrinsic contribution to the AHE, which can be accurately evaluated using ab initio electronic structure calculations. Our magnetotransport measurements show a quadratic behavior of the Hall resistivity with longitudinal resistivity, characteristic of scattering-independent processes, thus enabling the comparison with our ab initio calculations. The calculated Berry phase contribution to the AHE is in quantitative agreement with the measured AHE in these epilayers. Moreover, the predicted anisotropic dependence of the experimental AHE on the magnetization is well reproduced.

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“…2(d). These MR features of MnAs were already presented in [26][27][28], showing mainly the same results, and will not be further discussed in the present work.…”

Section: Samples and Experimentssupporting

confidence: 80%

Anomalous Hall effect in MnAs: Intrinsic contribution due to Berry curvature

Helman

Camjayi²,

Islam

et al. 2021

Phys. Rev. B

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Anisotropic magnetic-field-induced phase transition in MnAs nanoribbons

Baldis

Sirena

Steren

et al. 2015

Applied Physics Letters

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MnAs thin films present a phase coexistence of regularly arranged ferromagnetic (α) and paramagnetic (β) stripes below the Curie temperature when grown onto GaAs(100) substrates. In this letter, we report the observation of a magneto-structural phase transition induced by magnetic field on MnAs nanoribbons below the Curie temperature. A transformation of high-resistance paramagnetic regions into low-resistance ferromagnetic ones is observed above temperature-dependent critical magnetic fields. The phenomenon is hysteretic, highly anisotropic, and size dependent and could be the origin of the high magneto-resistance effect observed at temperatures close to room temperature in these systems.

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