Crystal structure ofLaTiO3.41under pressure

2004/02/27 by I. Loa, K. Syassen, X. Wang +4
Materials Science · Physics and Astronomy · #Electronic and Structural Properties of Oxides #Ferroelectric and Piezoelectric Materials #Magnetic and transport properties of perovskites and related materials #cond-mat.str-el

paper · pdf · doi:10.1103/physrevb.69.224105

published as Phys. Rev. B. 69, 224105 (2004) · 5 pages, 6 figures

arxiv created 2004/02/27 · openalex publication_date 2004/06/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The crystal structure of the layered, perovskite-related LaTiO_3.41 (La₅Ti₅O_17+\ensuremathδ) has been studied by synchrotron powder x-ray diffraction under hydrostatic pressure up to 27\phantom\rule0.3em0exGPa (T=295\phantom\rule0.3em0exK). The ambient-pressure phase was found to remain stable up to 18\phantom\rule0.3em0exGPa. A sluggish, but reversible phase transition occurs in the range 18--24\phantom\rule0.3em0exGPa. The structural changes of the low-pressure phase are characterized by a pronounced anisotropy in the axis compressibilities, which are at a ratio of approximately 1:2:3 for the a, b, and c axes. The possible effects of pressure on the electronic properties of LaTiO_3.41 are discussed.

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