Stretching magnetism with an electric field in a nitride semiconductor

D. Sztenkiel, M. Foltyn, G. P. Mazur, R. Adhikari, K. Kosiel, K. Gas, M. Zgirski, R. Kruszka, R. Jakiela, Tian Li, A. Piotrowska, A. Bonanni, M. Sawicki and T. Dietl ()
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D. Sztenkiel: Institute of Physics, Polish Academy of Sciences
M. Foltyn: Institute of Physics, Polish Academy of Sciences
G. P. Mazur: Institute of Physics, Polish Academy of Sciences
R. Adhikari: Institut für Halbleiter- und Festkörperphysik, Johannes Kepler University
K. Kosiel: Institute of Electron Technology
K. Gas: Institute of Physics, Polish Academy of Sciences
M. Zgirski: Institute of Physics, Polish Academy of Sciences
R. Kruszka: Institute of Electron Technology
R. Jakiela: Institute of Physics, Polish Academy of Sciences
Tian Li: Institute of Physics, Polish Academy of Sciences
A. Piotrowska: Institute of Electron Technology
A. Bonanni: Institut für Halbleiter- und Festkörperphysik, Johannes Kepler University
M. Sawicki: Institute of Physics, Polish Academy of Sciences
T. Dietl: Institute of Physics, Polish Academy of Sciences

Nature Communications, 2016, vol. 7, issue 1, 1-9

Abstract: Abstract The significant inversion symmetry breaking specific to wurtzite semiconductors, and the associated spontaneous electrical polarization, lead to outstanding features such as high density of carriers at the GaN/(Al,Ga)N interface—exploited in high-power/high-frequency electronics—and piezoelectric capabilities serving for nanodrives, sensors and energy harvesting devices. Here we show that the multifunctionality of nitride semiconductors encompasses also a magnetoelectric effect allowing to control the magnetization by an electric field. We first demonstrate that doping of GaN by Mn results in a semi-insulating material apt to sustain electric fields as high as 5 MV cm−1. Having such a material we find experimentally that the inverse piezoelectric effect controls the magnitude of the single-ion magnetic anisotropy specific to Mn3+ ions in GaN. The corresponding changes in the magnetization can be quantitatively described by a theory developed here.

Date: 2016
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DOI: 10.1038/ncomms13232

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