Issue |
Europhys. Lett.
Volume 63, Number 2, July 2003
|
|
---|---|---|
Page(s) | 303 - 309 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2003-00528-3 | |
Published online | 01 November 2003 |
Neutron diffuse scattering from
relaxor ferroelectric
1
Laboratory for Neutron Scattering, ETHZ &
Paul-Scherrer Institut CH-5232 Villigen PSI, Switzerland
2
Ioffe Physical Technical Institute - 26
Politekhnicheskaya 194021, St. Petersburg, Russia
Received:
17
February
2003
Accepted:
23
May
2003
We report first single-crystal measurements on the
relaxor ferroelectric by means of
neutron scattering. We observe neutron diffuse scattering around
the (110) Bragg position in the temperature range
T=20–295
. The diffuse scattering is found to be
elongated in the transverse direction, as it is expected for
polarization fluctuations in the presence of dipole-dipole
forces. The susceptibility associated with this scattering
decreases linearly with increasing temperature from T=100
up to 220
. The corresponding correlation length ξ
reaches a maximum of 42
near T=100
. At room
temperature, the diffuse scattering has a finite energy width
indicating a relaxation time of
.
PACS: 77.80.-e – Ferroelectricity and antiferroelectricity / 61.12.-q – Neutron diffraction and scattering
© EDP Sciences, 2003
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