Hydrogen Control of Ferromagnetism in a Dilute Magnetic Semiconductor

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GÖNNENWEIN, Sebastian T. B., Thomas A. WASSNER, Hans HUEBL, Martin S. BRANDT, Jan B. PHILIPP, Matthias OPEL, Rudolf GROSS, Achim KOEDER, Wladimir SCHOCH, Andreas WAAG, 2004. Hydrogen Control of Ferromagnetism in a Dilute Magnetic Semiconductor. In: Physical Review Letters. American Physical Society (APS). 92(22), 227202. ISSN 0031-9007. eISSN 1079-7114. Available under: doi: 10.1103/PhysRevLett.92.227202

@article{Gonnenwein2004-06-04Hydro-52558, title={Hydrogen Control of Ferromagnetism in a Dilute Magnetic Semiconductor}, year={2004}, doi={10.1103/PhysRevLett.92.227202}, number={22}, volume={92}, issn={0031-9007}, journal={Physical Review Letters}, author={Gönnenwein, Sebastian T. B. and Wassner, Thomas A. and Huebl, Hans and Brandt, Martin S. and Philipp, Jan B. and Opel, Matthias and Gross, Rudolf and Koeder, Achim and Schoch, Wladimir and Waag, Andreas}, note={Article Number: 227202} }

Brandt, Martin S. Huebl, Hans Hydrogen Control of Ferromagnetism in a Dilute Magnetic Semiconductor Waag, Andreas Gönnenwein, Sebastian T. B. terms-of-use Gross, Rudolf Brandt, Martin S. Koeder, Achim Schoch, Wladimir Wassner, Thomas A. We show that upon exposure to a remote dc hydrogen plasma, the magnetic and electronic properties of the dilute magnetic semiconductor Ga<sub>1-x</sub>Mn<sub>x</sub>As change qualitatively. While the as-grown Ga<sub>1-x</sub>Mn<sub>x</sub>As thin films are ferromagnetic at temperatures T less, similar 70 K, the samples are found to be paramagnetic after the hydrogenation, with a Brillouin-type magnetization curve even at T=2 K. Comparing magnetization and electronic transport measurements, we conclude that the density of free holes p is significantly reduced by the plasma process, while the density of Mn magnetic moments does not change. 2004-06-04 Wassner, Thomas A. Huebl, Hans Gross, Rudolf Waag, Andreas Opel, Matthias Gönnenwein, Sebastian T. B. eng Philipp, Jan B. Schoch, Wladimir 2021-01-26T08:39:54Z 2021-01-26T08:39:54Z Koeder, Achim Philipp, Jan B. Opel, Matthias

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