| Affiliation: | (1) Department of Physics and Department of Complexity Science and Engineering, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;(2) National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan;(3) Synchrotron Radiation Research Unit, Japan Atomic Energy Agency, Sayo-gun Hyogo, 679-5148, Japan;(4) Japan Synchrotron Radiation Research Institute, Kouto 1-1-1, Mikaduki-cho, Sayou-gun Hyogo, 679-5148, Japan;(5) Department of Quantum Matter, ADSM, Hiroshima University, Hagashi-Hiroshima 739-8530, Japan;(6) NanoElectronics Research Institute, AIST, Tsukuba Central 2, Umezono 1-1-1, Tsukuba, Ibaraki 305-8568, Japan |
| Abstract: | The electronic structure of the Cr ions in Zn1−x
Cr
x
Te (x=0.03 and 0.15) has been investigated using X-ray magnetic circular dichroism (XMCD) and photoemission spectroscopy. Magnetic-field
(H) and temperature (T) dependences of the Cr L
2,3 XMCD spectra well corresponded to the behavior of the magnetization measured by a SQUID magnetometer. The line shape of the
Cr L
2,3 XMCD spectra was independent of H,T, and x, indicating that the ferromagnetism was originated from the same Cr electronic states independent of Cr concentration. The
Cr 3d partial density of states (DOS) showed a peak at the top of the valence band but there was no DOS at the Fermi level, corresponding
to their insulating behaviors. |
