Giant domain wall response of highly twinned ferroelastic materials

Many ferroelastic crystals display at sufficiently low measurement frequencies a huge elastic softening below Tc which is caused by domain wall motion. Materials range from perovskites to iron based superconductors and shape memory materials. We present a model - based on Landau-Ginzburg theory incl...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Schranz, W, Kabelka, H, Sarras, A, Burock, M
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 14.01.2016
Subjects
Domain walls
Ferroelastic materials
Perovskites
Physics - Materials Science
Physics - Mesoscale and Nanoscale Physics
Shape memory
Softening
Strontium titanates
Superelasticity
Online AccessGet full text

Cover

More Information
Summary:Many ferroelastic crystals display at sufficiently low measurement frequencies a huge elastic softening below Tc which is caused by domain wall motion. Materials range from perovskites to iron based superconductors and shape memory materials. We present a model - based on Landau-Ginzburg theory including long range elastic interaction between needle shaped ferroelastic domains - to describe the observed superelastic softening. The theory predicts that the domain wall contribution to the elastic susceptibility is different for improper and proper ferroelastic materials. A test of the theory against experimental data on SrTiO3, KMnF3, LaAlO3, La1-xNdxP5O14 and NH4HC2O4.1/2H2O yields excellent agreement.
ISSN:2331-8422
DOI:10.48550/arxiv.1601.03590