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 language | English (US) |
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Article number | 257602 |
Journal | Physical review letters |
Volume | 97 |
Issue number | 25 |
DOIs | |
State | Published - 2006 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy