Ferromagnetic resonance and spin-wave resonances in GaMnAsP films

Xinyu Liu; Xiang Li; Seul-Ki Bac; Xucheng Zhang; Sining Dong; Sanghoon Lee; Margaret Dobrowolska; Jacek K. Furdyna

doi:10.1063/1.5006090

AIP Advances (May 2018)

Ferromagnetic resonance and spin-wave resonances in GaMnAsP films

Xinyu Liu,
Xiang Li,
Seul-Ki Bac,
Xucheng Zhang,
Sining Dong,
Sanghoon Lee,
Margaret Dobrowolska,
Jacek K. Furdyna

Affiliations

Xinyu Liu: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
Xiang Li: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
Seul-Ki Bac: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
Xucheng Zhang: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
Sining Dong: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
Sanghoon Lee: Department of Physics, Korea University, Seoul 136-701, Korea
Margaret Dobrowolska: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
Jacek K. Furdyna: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA

DOI: https://doi.org/10.1063/1.5006090
Journal volume & issue: Vol. 8, no. 5
pp. 056402 – 056402-6

Abstract

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A series of Ga1-xMnxAs1-yPy films grown by MBE on GaAs (100) substrates was systematically studied by ferromagnetic resonance (FMR). Magnetic anisotropy parameters were obtained by analyzing the angular dependence of the FMR data. The results clearly show that the easy axis of the films shifts from the in-plane [100] direction to the out-of-plane [001], indicating the emergence of a strong tensile-strain-induced perpendicular anisotropy when the P content exceeds y ≈ 0.07. Multiple resonances were observed in Ga1-xMnxAs1-yPy films with thicknesses over 48 nm, demonstrating the existence of exchange-dominated non-propagating spin-wave modes governed by surface anisotropy.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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