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Formation of Mn-As Centers in In1-xMnxAs Diluted Magnetic Semiconductors

  • A. Krol (a1), Y. L. Soo (a1), Z. H. Ming (a1), Y. H. Kao (a1), H. Munekata (a2) and L. L. Chang (a2)...

Abstract

XAFS spectra at the Mn K-edge were obtained for films of In1-xMnxAs (0.0014 ≤x ≤ 0.12) grown by MBE method at two different substrate temperatures Ts, = 200–210 °C and Ts, = 280–300 ° C. It has been found that Mn-As complexes which consist of a central Mn atom surrounded by six neighboring As most likely arranged in the form of a distorted trigonal antiprism with one or two additional Mn atoms placed on the long axis of the antiprism, can substitute for the In-As tetrahedron in the undistorted zincblende structure. For a composition of x = 0.12 we have found the formation of MnAs clusters with NiAs-like structure in the high-growth-temperature samples. We thus conclude that the magnetic properties of the In1-xMnx As semiconductors are mainly determined by the formation and local structure ol'the Mn-As complexes.

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1. Munekata, H. et al., Phys. Rev. Lett. 63, 1849 (1989).
2. Munekata, H et al. J. Vac. Sci. Technol. B 8, 176 (1990).
3. Ohno, H. et al., J. Appl. Phys. 69, 6103 (1991).
4. Munekata, H., Ohno, H., Ruf, R. R., Gambino, R. J., and Chang, L. L., J. Cryst. Growth (1991) 11, 1011 (1991).
5. Molnar, S. von et al., J. Magnetism Magn. Materials 93, 356 (1991).
6. Krol, A. et al. preprint.
7. Stern, E. A. in X-ray Absorption edited by Koningsberger, D. C. and Prins, R. (Wiley, New York, 1988), p. 3.
8. McKale, A. G., Veal, B. W., Paulikas, A. P., Chan, S.-K., and Knapp, G. S., J. Am. Chem. Soc. 110, 3763 (1988).
9. Lee, P. A., Citrin, F. H., Eisenberger, P., and Kincaid, B. M., Rev. Mod. Phys. 53, 769 (1981). T. M. Hayes and J. B. Boyce, in Solid State Physics, edited by H. Ehrenreich, F. Seitz, and D. Turnbull (Academic, New York, 1982), Vol. 37, p. 173. E. A. Stern and S. M. Heald, in Handbook on Synchrotron Radiation, edited by E. E. Koch (North- Holland, New York, 1983), Vol.1, p. 955. D. E. Sayers, B. A. Bunker, in X-ray Absorption, edited by D. C. Koningsberger and R. Prins (Wiley, New York, 1988), p. 211.
10. Crozier, E. D., Rehr, J. J. and Ingalls, R., in X-ray Absorption, edited by Koningsberger, D. C. and Prins, R. (Wiley, New York, 1988), p. 373.
11. Batien, F. and Weber, J., Phys. Rev. B 37, 10 111 (1988)

Formation of Mn-As Centers in In1-xMnxAs Diluted Magnetic Semiconductors

  • A. Krol (a1), Y. L. Soo (a1), Z. H. Ming (a1), Y. H. Kao (a1), H. Munekata (a2) and L. L. Chang (a2)...

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