Molecular crystals and liquid crystals science technology. Section A, Molecular crystals and liquid crystals/Molecular crystals and liquid crystals science and technology. Section A, Molecular crystals and liquid crystals · 1996 · 13 citations · 6 references
Natural SciencesChemistryPhysicsInorganic ChemistryMagnetic MaterialsSpectroscopyElectronic StructureMagnetic Properties Of SolidsMagnetic SusceptibilityMagnetism In SolidsMagnetism Of Inorganic CompoundsRelaxation MechanismsElectronic Structure AnalysisMagneto-electronic StructureMolecular MagnetismNuclear Magnetic MomentsParamagnetic ComplexesSpin RelaxationSpin-lattice RelaxationSpin-lattice Relaxation Effects
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.
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Hatsumi Mori, Shōji Tanaka, Takehiko Mori et al. · Bulletin of the Chemical Society of Japan · 1995 · 75 citations