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EPR study of the structural phase transitions in Fe 3+ doped TlInS 2
Author(s) -
Mikailov F. A.,
Kazan S.,
Rameev B. Z.,
Acikgoz M.,
Aktaş B.
Publication year - 2006
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200563122
Subject(s) - electron paramagnetic resonance , doping , ferroelectricity , atmospheric temperature range , tetrahedron , phase (matter) , resonance (particle physics) , crystallography , phase transition , principal axis theorem , condensed matter physics , rotation (mathematics) , chemistry , materials science , nuclear magnetic resonance , physics , atomic physics , geometry , optoelectronics , organic chemistry , mathematics , dielectric , meteorology
The results of low temperature EPR investigations of Fe doped TlInS 2 single crystals in the temperature range 5–300 K are presented. The EPR signal due to Fe 3+ centers located at the centers of InS 4 tetrahedrons has been observed. It has been established that the resonance lines exhibit a slight shift and remarkable splitting at the temperatures lower than 200 K, which is attributed to the effect of the ferroelectric phase transition. The rotational patterns of the resonance fields reveal a doubling of the number of centers at low temperatures. The preliminary simulation indicates that the doubling is related to the rotation of the principal axis system of the centers, while the magnitude of fine structure splitting is nearly the same. ( © 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)