Orthogonal interfacial exchange coupling in GaMnAsP/GaMnAs bilayers

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

doi:10.1063/1.5006190

AIP Advances (May 2018)

Orthogonal interfacial exchange coupling in GaMnAsP/GaMnAs bilayers

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

Affiliations

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
Sining Dong: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
Xinyu Liu: Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556, USA
Sanghoon Lee: Department of Physics, Korea University, Seoul 136-701, Korea
Sergei Rouvimov: Department of Electrical Engineering, University of Notre Dame, Notre Dame, Indiana 46556, USA
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/10.1063/1.5006190
Journal volume & issue: Vol. 8, no. 5
pp. 056401 – 056401-6

Abstract

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We carried out a systematic study of magnetic ordering and magnetic interlayer coupling in Ga1-xMnxAs1-yPy/Ga1-xMnxAs bilayers using superconducting quantum interference device magnetometry and ferromagnetic resonance. Such bilayers are interesting, because the easy axis of the constituent materials are orthogonal. Our results show that the bilayers are strongly exchange-coupled at the interface, that manifests itself in the form of horizontal exchange-bias-like shifts of the hysteresis loops of the Ga1-xMnxAs layer, as observed in field-cooled magnetic measurements.

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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