TY - JOUR
T1 - Relaxor-like behavior in λ-(BETS)2FeCl4 studied by SR X-ray diffraction
AU - Komiyama, Satoshi
AU - Watanabe, Masashi
AU - Noda, Yukio
AU - Negishi, Eiichi
AU - Toyota, Naoki
PY - 2004/9
Y1 - 2004/9
N2 - We performed precise X-ray diffraction measurements on an organic conductor, λ-(BETS)2FeCl4, with synchrotron radiation, where BETS is bis(ethylendithio)tetraselenafulvalene. Around 70 K (=TFM), the width of the Bragg reflection increased, and its peak was split into two with decreasing temperature. The direction of splitting was 0.017a*-0.010b*+0.002c* in the reciprocal space. At 8.3 K (=TMI), the discontinuous change in c* was observed, and the peak of the Bragg reflection became single again, but remained broad. In the temperature region of TFM > T > TMI, it is considered that the system has a heterogeneous structure, and the coexistence of the high- and low-temperature phases below TFM is presumably related to the anomalous behavior of dielectric constant in the metallic phase. The size of regions/domains was estimated to be about 0.4 μm.
AB - We performed precise X-ray diffraction measurements on an organic conductor, λ-(BETS)2FeCl4, with synchrotron radiation, where BETS is bis(ethylendithio)tetraselenafulvalene. Around 70 K (=TFM), the width of the Bragg reflection increased, and its peak was split into two with decreasing temperature. The direction of splitting was 0.017a*-0.010b*+0.002c* in the reciprocal space. At 8.3 K (=TMI), the discontinuous change in c* was observed, and the peak of the Bragg reflection became single again, but remained broad. In the temperature region of TFM > T > TMI, it is considered that the system has a heterogeneous structure, and the coexistence of the high- and low-temperature phases below TFM is presumably related to the anomalous behavior of dielectric constant in the metallic phase. The size of regions/domains was estimated to be about 0.4 μm.
KW - BEDT-TSF
KW - Ferroelectric material
KW - Relaxor
KW - Synchrotron radiation
KW - X-ray diffraction
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U2 - 10.1143/JPSJ.73.2385
DO - 10.1143/JPSJ.73.2385
M3 - Article
AN - SCOPUS:17044421790
VL - 73
SP - 2385
EP - 2388
JO - Journal of the Physical Society of Japan
JF - Journal of the Physical Society of Japan
SN - 0031-9015
IS - 9
ER -