A composite high-pressure cell with sintered diamond insets for study of thermoelectric and thermomagnetic properties in a range up to 30 GPa: Application to Pr and PbTe

被引：29

作者：

Shchennikov, Vladimir V. ^{[1
]}

Ovsyannikov, Sergey V. ^{[1
,2
]}

Bazhenov, Anatoly V. ^{[3
]}

机构：

[1] Russian Acad Sci, Inst Met Phys, High Pressure Grp, Urals Div, Ekaterinburg 620041, Russia

[2] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

[3] Inst Met Thermal Tech, Ekaterinburg 620219, Russia

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2008年 / 69卷 / 09期

基金：

俄罗斯基础研究基金会;

关键词：

High pressure; Crystal structure; Electron structure; Phase transitions; Transport properties;

D O I：

10.1016/j.jpcs.2008.04.009

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A composite high-pressure cell with the sintered diamond insets is reported to be an effective tool for investigation of transport properties of solids under pressure as high as similar to 30 GPa. The temperature distribution inside the cell was calculated. Using this cell, the pressure-driven phase transitions in praseodymium (Pr) have been studied by the thermopower technique (Seebeck effect). The results have shown that a scenario of the phase transitions in Pr (existence of the monoclinic C2/m phase) crucially depends on defects and distortions in a crystal lattice. So, the monoclinic phase was noticeable only for the first pressurization cycle. A technique of measurement of the longitudinal and the transverse thermomagnetic Nernst-Ettingshausen (N-E) effects (magnetothermopower) under high P is explained. With an example of lead telluride (PbTe), it is demonstrated that magnetic field can significantly improve the thermoelectric efficiency under pressure. The merits of the cell developed are discussed concerning basic research and technologies. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：2315 / 2324

页数：10

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