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

Research output: Contribution to journalArticlepeer-review

86 Scopus citations

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 (US)
Article number257602
JournalPhysical review letters
Volume97
Issue number25
DOIs
StatePublished - 2006

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy

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