Title

In-situ neutron diffraction of LaCoO3 perovskite under uniaxial compression. II. Elastic properties

Authors

Authors

M. Lugovy; A. Aman; Y. Chen; N. Orlovskaya; J. Kuebler; T. Graule; M. J. Reece; D. Ma; A. D. Stoica;K. An

Comments

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Abbreviated Journal Title

J. Appl. Phys.

Keywords

FERROELASTICITY; CERAMICS; BEHAVIOR; STRAIN; Physics, Applied

Abstract

Calculations of elastic constants and development of elastic anisotropy under uniaxial compression in originally isotropic polycrystalline LaCoO3 perovskite are reported. The lattice strains in individual (hkl) planes as well as average lattice strain were determined both for planes oriented perpendicular and parallel to the loading direction using in-situ neutron diffraction. Utilizing average lattice strains as well as lattice strains along the a and c crystallographic directions, an attempt was made to determine Poisson's ratio of LaCoO3, which was then compared with that measured using an impulse excitation technique. The elastic constants were calculated and Young's moduli of LaCoO3 single crystal in different crystallographic directions were estimated. (C) 2014 AIP Publishing LLC.

Journal Title

Journal of Applied Physics

Volume

116

Issue/Number

1

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

9

WOS Identifier

WOS:000339621400014

ISSN

0021-8979

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