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On the anisotropy of the exchange interactions in the ion radical salt (TCNQ) 2 ‐3,3 diethyltiaearbocyanine
Author(s) -
Fedutin D. N.,
Shchegolev I. F.,
Stryukov V. B.,
Yagubskii E. B.,
Zvarykina A. V.,
Atovmyan L. O.,
Kaminskii V. F.,
Shibaeva R. P.
Publication year - 1971
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220480105
Subject(s) - electron paramagnetic resonance , laser linewidth , anisotropy , chemistry , ion , paramagnetism , spin (aerodynamics) , spectral line , crystallography , magnetic susceptibility , exchange interaction , nuclear magnetic resonance , condensed matter physics , ferromagnetism , physics , astronomy , optics , thermodynamics , laser , organic chemistry , quantum mechanics
An investigation is made of the crystal structure, electron spin resonance (ESR), and static paramagnetic susceptibility of single crystals of the complex (TCNQ) 2 ‐3,3 diethyltiacarbocyanine (DTC). It is shown that the splitting of the ESR spectra is due to the anisotropy of the g‐factors of non‐equivalent ion‐radical chains of TCNQ. The g‐tensor of a single ion‐radical chain of TCNQ is found to have molecular symmetry ( g xx = 2.0026, g yy = 2.0034, g zz = 2.0021; all ±0.0003.) The existence of splitting of the ESR spectra gives evidence that there is no exchange interaction between non‐equivalent chains. However, the measurements of the static paramagnetic susceptibility and the linewidth analysis indicate that the intra‐chain exchange interaction I / K has a large value: 10 to 15°. Thus, our results show that the spin system in the complex (TCNQ),‐DTC is one‐dimensional.