X-ray powder diffraction study of the phase transitions in Ti4O7

被引：3

作者：

Melzer, R

Ruscher, CH

机构：

[1] Inst. fur Mineral. und Kristal., TU Berlin

[2] Institut für Mineralogie, Universität Hannover

[3] Inst. fur Mineral. und Kristal., TU Berlin - Sekr. BH1, D-10587 Berlin

来源：

PHASE TRANSITIONS | 1996年 / 58卷 / 04期

关键词：

Ti4O7; phase transitions; spontaneous strain;

D O I：

10.1080/01411599608241825

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

A high precision temperature dependent X-ray powder diffraction study has been carried out on Ti4O7 in the temperature range between 180 and 90 K enclosing the metal-insulator and the so-called Ti4O7-Verwey transition. Both transitions are characterized by negative Volume effects as can be deduced from the temperature dependent course of the lattice parameters. Total strains induced by the formation of the intermediate phase are about 0.007 and about twice that value in the low temperature phase. In successive heating and cooling runs it is observed that the low temperature transition occurs stepwise, possibly related to the deterioration of the modulated structure.

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收藏

页码：285 / 295

页数：11

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