J. Phys. IV France
Volume 114, April 2004
Page(s) 123 - 124

J. Phys. IV France
114 (2004) 123
DOI: 10.1051/jp4:2004114026

Competition electronic states of (TMTTF) 2MF 6: ESR investigations

T. Nakamura1, 2, 1 and K. Maeda2

1  Institute for Molecular Science, Myodaiji, Okazaki 444-8585, Japan
2  The Graduate University for Advanced Studies, Myodaiji, Okazaki 444-8585, Japan

ESR measurements were performed to investigate the low-temperature electronic states of (TMTTF) 2MF 6 ( M = P, As, Sb and their mixed alloys). The temperature dependence of the ESR linewidth, $\Delta H_{\rm pp}$, of AsF 6 does not change its anisotropy at around  $T_{\rm sp}$. On the other hand, PF 6 and some P-AsF 6 alloys show changes of the $\Delta H_{\rm pp}$ anisotropy at around  $T_{\rm sp}$, suggesting reconstruction of electronic charges. We propose the possible charge ordering configuration in the vicinity of the low temperature ground states from the ESR point of view. Key words. TMTTF - Charge Ordering - ESR.

© EDP Sciences 2004