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

authored by

R. Melzer, C. H. Rüscher

Abstract

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.

Organisation(s)

Institute of Mineralogy

External Organisation(s)

Technische Universität Berlin

Type

Article

Journal

Phase transitions

Volume

58

Pages

285-295

No. of pages

11

ISSN

0141-1594

Publication date

1996

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

Instrumentation, General Materials Science

Electronic version(s)

https://doi.org/10.1080/01411599608241825 (Access: Closed)