NMR Studies of (TMTSF)2PF6 |
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| Authors: | J. C. Scott E. M. Engler W. G. Clark C. Murayama K. Bechgaard H. J. Pedersen |
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| Affiliation: | 1. IBM Research Laboratory , San Jose, California, 95193;2. Department of Physics UCLA , Los Angeles, California, 90024;3. H.C. Orsted Institute Copenhagen University , DK-2100, Copenhagen;4. Physics Laboratory III Technical University of Denmark , DK-2800, Lyngby |
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| Abstract: | Abstract Pulsed NMR determinations of the relaxation times T2, T2* and T1, as a function of temperature and field, for the methyl group protons in (TMTSF)2PF6 are reported. Below the metal-insulator transition (TMI)T2* shortens while T2 increases, indicating a line which is inhomogeneously broadened due to the onset of a SDW. The SDW also contributes to the spin-lattice relaxation rate, T1 ?1, in the neighborhood of TMI. A frequency dependent maximum in T1 ?1 is observed near 20K and is attributed to methyl group rotation. A frequency independent maximum at 58K suggests a structural phase transition involving rearrangement of the methyl and PF6 groups. |
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| Keywords: | thermotropics synthesis isocyanides biphenyl haloalkynes |
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