Acoustic emission and domain wall dynamics in ferroelectric-ferroelastic gadolinium and terbium molybdate

Abstract
The production of acoustic emission during polarisation reversal in gadolinium molybdate and its isomorph terbium molybdate has been correlated with the motion of domain walls studied by electrical and optical means. It is concluded that this acoustic emission is the acoustic analogue of the ferroelectric Barkhausen effect and that it is produced by the creation and annihilation of domain walls during the switching process.

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