Doping of Fe to In2O3

• DOI: 10.1016/j.tsf.2005.10.022
• Publication Date: 2005-11-21T15:21:36Z
• Authors: Shigemi Kohiki; Masakuni Sasaki; Yusuke Murakawa; Kyoko Hori; Koichi Okada; Hirokazu Shimooka; Takayuki Tajiri; Hiroyuki Deguchi; Shigenori Matsushima; Masaoki Oku; Toetsu Shishido; Masao Arai; Masanori Mitome; Yoshio Bando
• Keywords: Superexchange; Crystal (programming language); Lattice (music)

Abstract Model cluster calculations by discrete variational-Xα method for the Fe 3+ ions at 8 b and 24 d sites of the In 2 O 3 crystal lattice demonstrated that the density of states of the Fe 3+ 3d electrons located around the center of the band gap, and the spin density of states for the Fe 3+ ions at 8 b and 24 d sites are asymmetric. For Fe-doped In 2 O 3 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 In 2 O 3 powders can be attributed to superexchange interactions between Fe 3+ ions substituted for In 3+ ions of the In 2 O 3 crystal lattice.