Anomaly of the Sound Velocity near the Ferroelectric Phase Transition of TGSe at High Pressure
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概要
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The temperature dependence of the ultrasound velocities of TGSe singlecrystals at several hydrostatic pressures has been measured ntear the ferroelectricphase transition. Below T. it is found that the anomalies of the sotmd velocitiesalong the a' and c axes exhibit remarkable pressure dependences. The jump ofthe sound velocity for the c axis near T. exhibits a maxirnum at the pressurenear l kbar, while the jump for the a' axis increases monotonically with pressureand saturates at the pressure near the tricritical point. These pressure effects arefound to be explained in terms of the parameters in molecular field theory.
- 社団法人日本物理学会の論文
- 1978-04-15
著者
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Yamashita Haruyasu
Kushiro Technical College
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Tatsuzaki Itaru
Research Institute Of Applied Electricity Hokkaido University
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TODO Isamu
Kushiro Technical College
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