Abstract
We have investigated the effect of Sb/Ga flux ratio on the magnetic and electronic properties of Mn-incorporated GaSb random and digital alloys grown by low-temperature molecular beam epitaxy. The magnetic and magnetotransport properties of Ga1−xMn x Sb random alloys are strongly dependent on Sb/Ga flux ratio. Clear square-like hysteresis loops were observed for Sb/Ga flux ratios between 4.60 and 5.25. The coercive field and negative magnetoresistance increase with decreasing Sb/Ga flux ratio, while the Curie temperature remains constant at approximately 23 K, with no systematic dependence on the hole density. In contrast, the Curie temperatures for the GaSb:Mn digital alloys with different Mn surface coverages depend significantly on the Sb/Ga flux ratio, and it is also directly correlated with the hole density.
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References
H. Ohno, D. Chiba, F. Matsukura, T. Omiya, E. Abe, R. Dietl, Y. Ohno, and K. Ohtani, Nature 408, 944 (2000).
G. B. Kim, M. Cheon, S. Wang, H. Luo, B. D. McCombe, X. Liu, Y. Sasaki, T. Wojtowicz, and J. K. Furdyna, Physica E 20, 355 (2004).
S. Koshihara, A. Oiwa, M. Hirasawa, S. Katsumoto, Y. Iye, C. Urano, H. Takagi, and H. Menekata, Phys. Rev. Lett. 78(24), 4617 (1997).
F. Matsukura, D. Chiba, T. Omiya, E. Abe, T. Dietl, Y. Ohno, K. Ohtani, and H. Ohno, Physica E 12, 351 (2002).
X. Chen, M. Na, M. Cheon, S. Wang, H. Luo, B. D. McCombe, X. Liu, Y. Sasaki, T. Wojtowicz, J. K. Furdyna, S. J. Potashnik, and P. Schiffer, Appl. Phys. Lett. 81(3), 511 (2002).
F. Matsukura, E. Abe, and H. Ohno, J. Appl. Phys. 87(9), 6442 (2000).
H. Shimizu, T. Hayashi, T. Nishinaga, and M. Tanaka, Appl. Phys. Lett. 74(3), 39(1999).
T. Dietl, H. Ohno, and F. Matsukura, Phys. Rev. B 63, 195205 (2001).
T. Jungwirth, Qian Niu, and A. H. MacDonald, Phys. Rev. Lett. 88, 207208 (2002).
T. Dietl, H. Ohno, F. Matsukura, J. Cibert, and D. Ferrand, Science 287, 1019 (2000).
S. C. Erwin and A. G. Petukhov, Phys. Rev. Lett. 89(22), 227201 (2002).
K. M. Yu, W. Walukiewicz, T. Wojtowicz, I. Kuryliszyn, X. Liu, Y. Sasaki, and J. K. Furdyna, Phys. Rev. B 65, 201303 (2002).
K. Y. Wang, K. W. Edmunds, R. P. Campion, B. L. Gallagher, N. R. S. Farley, M. Sawicki, P. Boguslawski, and T. Dietl, J. Appl. Phys. 95(11), 6512 (2004).
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Kim, G.B., Cheon, M., Wang, S. et al. Magnetic and Electrical Properties of Random and Digital Alloys of GaSb:Mn. J Supercond 18, 87–92 (2005). https://doi.org/10.1007/s10948-005-2156-6
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DOI: https://doi.org/10.1007/s10948-005-2156-6