Vanishing of Tc and appearance of quantum paraelectricity in KD2PO4 and KH2PO4 under high pressure

被引：6

作者：

Endo, S ^{[1
]}

Deguchi, K

Tokunaga, M

机构：

[1] Osaka Univ, Res Ctr Mat Sci Extreme Condit, Toyonaka, Osaka 5608531, Japan

[2] Shizuoka Inst Sci & Technol, Dept Mat Sci, Shizuoka 4378555, Japan

[3] Hokkaido Univ, Dept Phys, Grad Sch Sci, Sapporo, Hokkaido 0800810, Japan

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2002年 / 14卷 / 44期

关键词：

D O I：

10.1088/0953-8984/14/44/467

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The temperature dependences of the dielectric constants of the hydrogen-bond ferroelectrics KH2PO4 (KDP) and KD2PO4 (DKDP) were measured under high hydrostatic pressure. Their ferroelectric transition temperatures T-c monotonically decreased with increasing pressure and the ferroelectric state vanished at p(c): 1.7 GPa for KDP and 6.1 GiPa for DKDP. On the other hand, the Curie constant remained finite at p, which indicates that the ferroelectric phase transition at high pressure is of displacive type. At pressures around p, quantum paraelectricity was observed in KDP and DKDP.

引用

页码：11275 / 11283

页数：9

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