Ferroelectric domain reversal in congruent LiTaO{sub 3} crystals at elevated temperatures

Journal Article · Mon Apr 24 00:00:00 EDT 2000 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.126368· OSTI ID:20216002

Battle, Charles C ^[1]; Kim, Sungwon ^[1]; Gopalan, Venkatraman ^[1]; Barkocy, Kendra ^[2]; Gupta, Mool C ^[2]; Jia, Q X ^[3]; Mitchell, T E ^[3]

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1. Materials Research Laboratory and Department of Materials Science and Engineering, Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
2. Applied Research Center, College of Engineering and Technology, Old Dominion University, Newport News, Virginia 23606 (United States)
3. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We report a four-times decrease in the electric fields for 180 degree sign domain reversal in congruent LiTaO{sub 3} crystals with an increase in temperature from 22 to 250 degree sign C. This is accompanied by a substantial broadening of the field range over which domain reversal takes place, by an order of magnitude. The large internal fields of {approx}5.5 kV/mm at room temperature, as measured by the asymmetry in polarization hysteresis loop, disappears at higher temperatures. With increasing temperature, the domain switching changes from lateral growth dominated to nucleation dominated kinetics. (c) 2000 American Institute of Physics.

• OSTI ID: 20216002
• Journal Information: Applied Physics Letters, Vol. 76, Issue 17; Other Information: PBD: 24 Apr 2000; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
FERROELECTRIC MATERIALS
LITHIUM OXIDES
TANTALATES
DOMAIN STRUCTURE
TEMPERATURE DEPENDENCE
HYSTERESIS
POLARIZATION
ELECTRIC FIELDS
EXPERIMENTAL DATA