Nature of Magnetic Coupling between Mn Ions in As-Grown Ga_1-xMn_xAs Studied by X-Ray Magnetic Circular Dichroism

Y. Takeda^1,*, M. Kobayashi², T. Okane¹, T. Ohkochi¹, J. Okamoto^1,†, Y. Saitoh¹, K. Kobayashi^1,§, H. Yamagami^1,8, A. Fujimori², A. Tanaka³, J. Okabayashi^4,‡, M. Oshima⁴, S. Ohya^5,6, P. N. Hai⁵, and M. Tanaka^5
1Japan Atomic Energy Agency, Synchrotron Radiation Research Center SPring-8, Sayo, Hyogo 679-5148, Japan
²Department of Physics, The University of Tokyo, Hongo, Tokyo 113-0033, Japan
³Graduate School of Advanced Sciences of Matter, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
⁴Department of Applied Chemistry, The University of Tokyo, Hongo, Tokyo 113-8656, Japan
⁵Department of Electronic Engineering, The University of Tokyo, Hongo, Tokyo 113-8656, Japan
⁶PRESTO Japan Science and Technology Agency, Kawaguchi, Saitama 331-0012, Japan
⁸Department of Physics, Faculty of Science, Kyoto Sangyo University, Kyoto, 603-8555, Japan

^*ytakeda@spring8.or.jp

^†National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinshuu Science Park, Hsinchu 30077, Taiwan, R. O. C.

^‡Department of Physics, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8551, Japan

^§National Institute for Materials Science, SPring-8, Sayo, Hyogo 679-5198, Japan