Temperature Dependence of 180° Domain Wall Velocity in BaTiO3
作者:
H. L. Stadler,
P. J. Zachmanidis,
期刊:
Journal of Applied Physics
(AIP Available online 1964)
卷期:
Volume 35,
issue 10
页码: 2895-2899
ISSN:0021-8979
年代: 1964
DOI:10.1063/1.1713125
出版商: AIP
数据来源: AIP
摘要:
The velocity of 180° domain walls in BaTiO3crystals with saltwater electrodes has been measured from 3° to 75°C at applied fields from 0.2 to 200 kV/cm by repeated partial switching and etching. Heating the crystal was found to lower the field required to attain any given wall velocity by a factor which is substantially the same for all wall velocities (or for all applied fields) and is determined wholly by the temperature change. The factor is about 3 for a change from 3° to 75°C. This behavior agrees with the Miller‐Weinreich mechanism of thermally activated wall movement. Domain shapes are found to be very rounded at 50° and 75°C, becoming almost exactly circular at 75°C around 1 kV/cm, in marked contrast to the well‐known square domains at 25°C and below.
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