@article{oai:nagoya.repo.nii.ac.jp:00005535,
 author = {Tanaka, Hisaaki and Kuroda, Shin-ichi and Yamashita, Takami and Mitsumi, Minoru and Toriumi, Koshiro},
 issue = {24},
 journal = {Physical Review B},
 month = {Jun},
 note = {ESR measurements have been performed on a quasi-one-dimensional (Q1D) halogen-bridged binuclear metal-complex Pt_2(n-pentylCS_2)_4I which exhibits successive electronic phase transitions. Anisotropy of the ESR linewidth shows a drastic change around 215 K where the phase transition takes place between a nonmagnetic alternate-charge-polarization (ACP) state for low temperatures and a paramagnetic averaged-valence (AV) state with a relatively good electrical conductivity for higher temperatures. In the AV state, a clear minimum of the linewidth is observed around 50° from the chain direction due to the contribution of the secular 1D dipolar term varying as 3 cos^2 θ−1, where θ denotes the angle between the external magnetic field and the chain axis. In addition to the dipolar contribution, the linewidth also exhibits temperature-dependent spin-phonon contribution. These features of linewidths are consistent with those reported previously for Q1D conductors such as charge transfer salts and Pt-complexes, providing microscopic evidence for the occurrence of a Q1D conduction-electron system in the present bimetal complex. In the ACP state, the spin concentration drastically decreases due to the nonmagnetic nature of the background electronic state. The linewidth shows a uniaxial anisotropy with respect to the chain axis, which can be reasonably ascribed to the anisotropy of unresolved hyperfine structures due to Pt and iodine nuclear spins. The spin susceptibility shows a clear enhancement from Curie-type behavior, accompanied with a change of the line shape from a nearly Gaussian at 4 K to Lorentzian with motional narrowing as the temperature is raised. The results further support our previous conjecture that the observed spins are thermally excited solitons.},
 pages = {245102--245102},
 title = {ESR studies of the spin dynamics in quasi-one-dimensional iodo-bridged diplatinum complex Pt_2(n-pentylCS_2)_4I},
 volume = {73},
 year = {2006}
}