| Issue |
Europhys. Lett.
Volume 65, Number 1, January 2004
|
|
|---|---|---|
| Page(s) | 137 - 143 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2003-10057-7 | |
| Published online | 01 December 2003 | |
Aging, rejuvenation and memory due to domain-wall
contributions in 
single crystals
1
Fachbereich Physik, Martin-Luther-Universität Halle F.-Bach-Platz 6, D-06108 Halle, Germany
2
Institute for Condensed Matter Physics - vul. Sventsits'kogo 1, 79005, L'viv, Ukraine
Received:
5
September
2003
Accepted:
28
October
2003
Isothermal aging is studied for crystals
which were slowly cooled below the ferroelectric phase-transition
temperature 
. Aging is strong within the temperature
range 
of high dielectric domain-wall
contributions, but less pronounced below the domain-freezing
temperature 
. Aging and thermal rejuvenation, setting
in if cooling is renewed, are discussed in terms of
reconformations of collectively pinned domain walls. Dielectric
anomalies, detected upon subsequent reheating in the vicinity of
the previous dwelling temperatures, are ascribed to a spatial
modulation of the defect structure, carrying memory of the
domain-wall roughness established during aging.
PACS: 77.22.Gm – Dielectric loss and relaxation / 77.80.Dj – Domain structure; hysteresis / 77.84.Fa – KDP- and TGS-type crystals
© EDP Sciences, 2004
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