EPR spectra of Fe centers in layered TlGaSe2 single crystal |
| |
Authors: | F.A. Mikailov B.Z. Rameev S. Kazan T.G. Mammadov |
| |
Affiliation: | a Department of Physics, Gebze Institute of Technology, Gebze, 41400 Kocaeli, Turkey b Institute of Physics, Azerbaijan Academy of Sciences, 370143 Baku, Azerbaijan c Kazan Physical-Technical Institute, 10/7, Sibirsky Trakt, 420029 Kazan, Russian Federation |
| |
Abstract: | A single-crystal TlGaSe2 doped by paramagnetic Fe ions has been studied at room temperature by electron paramagnetic resonance (EPR) technique. The fine structure of EPR spectra of paramagnetic Fe3+ ions was observed. The spectra were interpreted to correspond to the transitions among spin multiplet (S=5/2, L=0) of Fe3+ ion, which are splitted by the local ligand crystal field (CF) of orthorhombic symmetry. Four equivalent Fe3+ centers have been observed in the EPR spectra and the local symmetry of crystal field at the Fe3+ site and CF parameters were determined. Experimental results indicate that the Fe ions substitute Ga at the center of GaSe4 tetrahedrons, and the rhombic distortion of the CF is caused by the Tl ions located in the trigonal cavities between the tetrahedral complexes. |
| |
Keywords: | 75.10.Dg 76.30.Da 76.30.&minus v 71.70.Ch |
本文献已被 ScienceDirect 等数据库收录! |
|