Multiferroic domain dynamics in strained strontium titanate

A. Vasudevarao, A. Kumar, L. Tian, J. H. Haeni, Y. L. Li, C. -J. Eklund, Q. X. Jia, R. Uecker, P. Reiche, K. M. Rabe, L. Q. Chen, D. G. Schlom, Venkatraman Gopalan

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Abstract

Multiferroicity can be induced in strontium titanate by applying biaxial strain. Using optical second harmonic generation, we report a transition from 4/mmm to the ferroelectric mm2 phase, followed by a transition to a ferroelastic-ferroelectric mm2 phase in a strontium titanate thin film. Piezoelectric force microscopy is used to study ferroelectric domain switching. Second harmonic generation, combined with phase-field modeling, is used to reveal the mechanism of coupled ferroelectric-ferroelastic domain wall motion. These studies have relevance to multiferroics with coupled polar and axial phenomena.

Original languageEnglish
Article number257602
Pages (from-to)-
Number of pages4
JournalPhysical Review Letters
Volume97
Issue number25
DOIs
Publication statusPublished - 22 Dec 2006

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