Electronic Structures of Organic Conductors, (BEDT-TTF)2CsM(SCN)4 (M = Co, Zn)
- 1 July 1996
- journal article
- research article
- Published by Taylor & Francis in Molecular Crystals and Liquid Crystals
- Vol. 285 (1) , 57-62
- https://doi.org/10.1080/10587259608030778
Abstract
1H-NMR and EPR investigations of new organic conductors, (BEDT-TTF)2CsM(SCN)4(M=Co, Zn), have been performed. In the Co containing salt, the 1H-NMR spin-lattice relaxation rate, T 1 −1, is governed by the fluctuation of the localized magnetic moments on the Co2+ ions. The evaluated exchange interaction, J/κ B, is 0.09 K. A large increase in the 1H-NMR linewidth has been observed below 20 K for the Co salt, which can be explained as the effect of the static magnetization of the paramagnetic Co2+ ions. For the Zn containing salt, which has a closed d-shell, the 1H-NMR T 1 −1 and EPR properties exhibit anomalous behavior below 20 K, indicating a change in the electronic structure of the π-system around 20 K. The low-temperature electronic structure of the title compounds is discussed in the microscopic view.Keywords
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