Abstract
High and low field magnetotransport measurements, as well as SQUID measurements of magnetization, were carried out on Ga1−x Mn x As epilayers grown by low temperature molecular beam epitaxy, and subsequently annealed under various conditions. We observe a large enhancement of ferromagnetism when the samples are annealed at an optimal temperature, typically about 280°C. Such optimal annealing leads to an increase of Curie temperature, accompanied by an increase of both the conductivity and the saturation magnetization. A decrease of the coercive field and of magnetoresistivity is also observed for Ga1−x Mn x As annealed at optimal conditions. We suggest that the experimental results reported in this paper are related to changes in the domain structure of Ga1−x Mn x As.
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References
H. Ohno, Science 281, 951(1998).
F. Matsukura, H. Ohno, and T. Dietl, in Handbook on Magnetic Materials (Elsevier, Amsterdam), 14 (2002).
T. Dietl, Semicond. Sci. Technol. 17, 377(2002).
H. Ohno, F. Matsukura, A. Shen, Y. Sugawara, A. Oiwa, A. Endo, S. Katsumoto, and Y. Iye, in Proceedings of the 23rd International Congress on the Physics of Semiconductors, M. Scheffler and R. Zimmermann, eds. (World Scientific, Singapore, 1996), p. 405
H. Ohno, A. Shen, F. Matsukura, A. Oiwa, A. Endo, S. Katsumoto, and Y. Iye, Appl. Phys. Lett. 69, 363(1996).
T. Dietl, H. Ohno, F. Matsukura, J. Cibert, and D. Ferrand, Science 287, 1019(2000).
T. Jungwirth, J. Konig, J. Sinova, J. Kucera and A. H. MacDonald, Phys. Rev. B 66, 012402(2002).
T. Hayashi, Y. Hashimoto, S. Katsumoto, and Y. Iye, Appl. Phys. Lett. 78, 1691(2001).
S. J. Potashnik, K. C. Ku, S. H. Chun, J. J. Berry, N. Samarth, and P. Schiffer, Appl. Phys. Lett. 79, 1495(2001).
I. Kuryliszyn, T. Wojtowicz, X. Liu, J. K. Furdyna, W. Dobrowolski, J.-M. Broto, M. Goiran, O. Portugall, H. Rakoto, and B. Raquet, Acta Phys. Pol. A 102, 4–5, 659(2002).
K. M. Yu, W. Walukiewicz, T. Wojtowicz, I. Kuryliszyn, X. Liu, Y. Sasaki and J. K. Furdyna, Phys. Rev. B 65, 201303(R)(2002).
T. Fukumura, T. Shono, K. Inaba, T. Hasegawa, H. Koinuma, F. Matsukura, and H. Ohno, Physica E 10, 135(2001).
J. F. Gregg, W. Allen, K. Ounadjela, M. Viret, M. Hehn, S. M. Thompson, and J. M. D. Coey, Phys. Rev. Lett. 77, 1580(1996).
S. V. Barabash and D. Stroud, Appl. Phys. Lett. 79, 979(2001).
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Kuryliszyn, I., Wojtowicz, T., Liu, X. et al. Low Temperature Annealing Studies of Ga1−x Mn x As. Journal of Superconductivity 16, 63–66 (2003). https://doi.org/10.1023/A:1023228500247
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DOI: https://doi.org/10.1023/A:1023228500247