Doping of Fe to In2O3

• Published in: Thin solid films 2006-05, Vol.505 (1-2), p.122-125
• Main Authors: KOHIKI, Shigemi, SASAKI, Masakuni, SHISHIDO, Toetsu, ARAI, Masao, MITOME, Masanori, BANDO, Yoshio, MURAKAWA, Yusuke, HORI, Kyoko, OKADA, Koichi, SHIMOOKA, Hirokazu, TAJIRI, Takayuki, DEGUCHI, Hiroyuki, MATSUSHIMA, Shigenori, OKU, Masaoki
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Defects and impurities in crystals; microstructure; Doping and impurity implantation in other materials; Exact sciences and technology; Exchange and superexchange interactions; Magnetic properties and materials; Magnetically ordered materials: other intrinsic properties; Physics; Structure of solids and liquids; crystallography
• ISSN: 0040-6090; 1879-2731
• DOI: 10.1016/j.tsf.2005.10.022

Model cluster calculations by discrete variational-Xalpha method for the Fe3+ ions at 8b and 24d sites of the In2O3 crystal lattice demonstrated that the density of states of the Fe3+3d electrons located around the center of the band gap, and the spin density of states for the Fe3+ ions at 8b and 24d sites are asymmetric. For Fe-doped In2O3 powders, we found a cusp at ~30 K overlapping cluster glass behavior in dc susceptibility, though the cusp showed no frequency dependence in ac susceptibility. The cusp at ~30 K for the Fe-doped In2O3 powders can be attributed to superexchange interactions between Fe3+ ions substituted for In3+ ions of the In2O3 crystal lattice.