Physical properties of ternary TCNQ compound
| Autor: | Toshiaki Iwazumi, R.M. Lequan, Tomoyuki Sekine, Y. Kajita, M. Izumi, M. Lequan |
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| Rok vydání: | 1988 |
| Předmět: |
Condensed matter physics
Chemistry Mechanical Engineering Metals and Alloys Conductivity Condensed Matter Physics Electronic Optical and Magnetic Materials Crystallography chemistry.chemical_compound Electrical resistance and conductance Mechanics of Materials Ternary compound Electrical resistivity and conductivity Materials Chemistry Ternary operation Anisotropy Superstructure (condensed matter) Single crystal |
| Zdroj: | Synthetic Metals. 27:257-262 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/0379-6779(88)90153-1 |
| Popis: | Single crystal X-ray diffraction, ESR and electrical conductance were studied to clarify both the magnetic and transport properties on a radical-anion salt of ternary compound, Me 3 S + ( I 3 − ) 1 3 TCNQ − 2 3 with respect to the role of the I3− sublattice. In the single crystal ESR study, the anisotropic behaviour and the temperature dependence of g factor and linewidth were measured down to around 100 K. From the anisotropy of the g-factor it was revealed that the ESR signal arises from the electrons of the TCNQ molecules and the spin susceptibility exhibited the abrupt decrease below 170 K(Tm), which is the sign of the metal-insulator transition. Ac electrical conductivity up to 3 MHz showed that the conductivity becomes strongly frequency dependent below Tm. Single crystal X-ray study clarified that relatively large value of the Tm is due to a strong coupling between the I3− chains and the TCNQ superstructure. |
| Databáze: | OpenAIRE |
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