TY - JOUR
T1 - Elastic Softening in the Tetrahedrite Cu12Sb4S13
AU - Suzuki, Takashi
AU - Goto, Hiroki
AU - Ishii, Isao
AU - Noguchi, Yoshihito
AU - Kamikawa, Shuhei
AU - Suekuni, Koichiro
AU - Tanaka, Hiromi I.
AU - Takabatake, Toshiro
N1 - Funding Information:
This work was supported by JSPS KAKENHI Grant Numbers 262870830A, 26800189, 2624706001, and 26820296 from the Ministry of Education, Culture, Sports, Science, and Technology of Japan.
Publisher Copyright:
© 2015 The Authors. Published by Elsevier B.V.
PY - 2015
Y1 - 2015
N2 - The tetrahedrite Cu12Sb4S13 has a cubic structure above 100 K and is paid attention as thermoelectric materials. At 85 K, a metal-semiconductor phase transition is reported by the electrical resistivity and magnetic susceptibility measurements. The origin of the phase transition is not determined yet. To investigate the phase transition at 85 K, we measured elastic modulus using an ultrasonic technique on polycrystalline samples. The longitudinal modulus shows elastic softening from above 300 K, suggesting that there is an instability of the structure or the electronic state. The softening continues down to 85 K, and it turns into increase below 85 K accompanied by hysteresis. The phase transition is of the first-order. The elastic hardening indicates disappearance of the instability by the phase transition.
AB - The tetrahedrite Cu12Sb4S13 has a cubic structure above 100 K and is paid attention as thermoelectric materials. At 85 K, a metal-semiconductor phase transition is reported by the electrical resistivity and magnetic susceptibility measurements. The origin of the phase transition is not determined yet. To investigate the phase transition at 85 K, we measured elastic modulus using an ultrasonic technique on polycrystalline samples. The longitudinal modulus shows elastic softening from above 300 K, suggesting that there is an instability of the structure or the electronic state. The softening continues down to 85 K, and it turns into increase below 85 K accompanied by hysteresis. The phase transition is of the first-order. The elastic hardening indicates disappearance of the instability by the phase transition.
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U2 - 10.1016/j.phpro.2015.12.054
DO - 10.1016/j.phpro.2015.12.054
M3 - Conference article
AN - SCOPUS:84974705194
VL - 75
SP - 443
EP - 446
JO - Physics Procedia
JF - Physics Procedia
SN - 1875-3892
T2 - 20th International Conference on Magnetism, ICM 2015
Y2 - 5 July 2015 through 10 July 2015
ER -