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The Dynamics of Domain Walls Determined from Acoustic Emission Measurements

Lupascu, Doru C. and Utschig, Thomas and Shur, Vladimir Ya. and Shur, Alevtina G. (2003):
The Dynamics of Domain Walls Determined from Acoustic Emission Measurements.
In: Ferroelectrics, pp. 207-215, 290, (1), ISSN 0015-0193, [Online-Edition: http://dx.doi.org/10.1080/00150190390222475],
[Article]

Abstract

The field-induced jump-like dynamics of a single planar domain wall in single crystalline uniaxial ferroelectric-ferroelastic Gd 2 (MoO 4 ) 3 and needle domains in the perovskite BaTiO 3 are compared. Acoustic emission as well as ferroelectric Barkhausen pulse measurements were performed in order to investigate time coincidences with optically observed jumps. In both crystals significant amounts of acoustic emissions occur. The coincidences of both event types in Gd 2 (MoO 4 ) 3 are determined by the particular character of extended defects in the crystal and the relative orientation of the acoustic sensor. Hardly any Barkhausen pulses but huge amounts of acoustic pulses are observed for the annihilation of needle domains. The underlying microscopic mechanisms are discussed.

Item Type: Article
Erschienen: 2003
Creators: Lupascu, Doru C. and Utschig, Thomas and Shur, Vladimir Ya. and Shur, Alevtina G.
Title: The Dynamics of Domain Walls Determined from Acoustic Emission Measurements
Language: English
Abstract:

The field-induced jump-like dynamics of a single planar domain wall in single crystalline uniaxial ferroelectric-ferroelastic Gd 2 (MoO 4 ) 3 and needle domains in the perovskite BaTiO 3 are compared. Acoustic emission as well as ferroelectric Barkhausen pulse measurements were performed in order to investigate time coincidences with optically observed jumps. In both crystals significant amounts of acoustic emissions occur. The coincidences of both event types in Gd 2 (MoO 4 ) 3 are determined by the particular character of extended defects in the crystal and the relative orientation of the acoustic sensor. Hardly any Barkhausen pulses but huge amounts of acoustic pulses are observed for the annihilation of needle domains. The underlying microscopic mechanisms are discussed.

Journal or Publication Title: Ferroelectrics
Volume: 290
Number: 1
Uncontrolled Keywords: ferroelectrics; BaTiO3; Gd-2(MoO4)(3); acoustic emissions; ferroelectric Barkhausen pulses
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Nonmetallic-Inorganic Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 18 May 2011 15:20
Official URL: http://dx.doi.org/10.1080/00150190390222475
Identification Number: doi:10.1080/00150190390222475
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