Volume 55, Number 5, September 2001
|Page(s)||739 - 745|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 December 2003|
Effect of the biasing electric field on aging in potassium niobo-tantalate crystals
Laboratoire des Milieux Désordonnés et
Hétérogènes (Associated with
the Centre National de la Recherche Scientifique (UMR 7603).)
Université P. et M. Curie - Case
86, 75252 Paris Cedex 05, France
Accepted: 12 June 2001
Aging in the disordered ferroelectric potassium niobo-tantalate has been studied by measuring the real and imaginary parts of the dielectric constant at various frequencies when a biasing electric field is applied. It is found that rejuvenation and memory effects can be induced by the field. The effects of temperature and field are compared and the results are discussed in terms of a model which attributes the time-dependent part of the dielectric constant to growth and reconformation of the polarization domain walls.
PACS: 77.22.Gm – Dielectric loss and relaxation / 78.30.Ly – Disordered solids
© EDP Sciences, 2001
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