Thermoelectric study of the phase transitions in cerium at ultrahigh pressures from 0 to 20 GPa

被引：17

作者：

Ovsyannikov, SV ^{[1
]}

Shchennikov, VV ^{[1
]}

Goshchitskii, BN ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, Ural Div, Ekaterinburg 620219, Russia

来源：

JETP LETTERS | 2005年 / 81卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

05.70.Fh; 62.50.+p; 72.20.Pa; 81.40.Vw;

D O I：

10.1134/1.1914874

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The pressure dependences of the thermoelectric power S of Ce samples were measured at pressures P from 0 to 20 GPa in a synthetic diamond cell. The dependence of S on P was found to be nonmonotonic both in the region of transitions from the fcc (gamma) phase to the modified fcc (alpha) phase followed by the transition to the body-centered monoclinic (alpha '') and the tetragonal (epsilon) phases at pressures of about 1, 5-6, and 12-15 GPa, respectively, and in the stability region of these phases. The thermoelectric power sign was found to be positive for all high-pressure Ce phases. The found S(P) dependence was compared with the published computational data on the electronic structure of the cerium phases. Cerium was taken as an example to demonstrate the advantage of the thermoelectric studies over other methods of investigation of phase transitions. (C) 2005 Pleiades Publishing, Inc.

引用

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页码：167 / 170

页数：4

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