Issue |
Europhys. Lett.
Volume 50, Number 2, April II 2000
|
|
---|---|---|
Page(s) | 196 - 201 | |
Section | Condensed matter: structure, mechanical and thermal properties | |
DOI | https://doi.org/10.1209/epl/i2000-00254-x | |
Published online | 01 September 2002 |
Distinct roles of the triplicated
tetrahedra in phase soliton formation
and residual commensurations in
1
Department of Physics, Korea University - Seoul 136-701, Korea
2
Department of Physics, Pusan National University - Pusan 609-735, Korea
Corresponding authors: dko@ftnmr0.korea.ac.kr rscel@kuccnx.korea.ac.kr
Received:
21
May
1999
Accepted:
29
January
2000
The dynamics of the tetrahedra in the ferroelectric lock-in phase of
K2ZnCl4 was studied by means of pulsed
NQR (nuclear
quadrupole resonance) techniques.
From the temperature dependence of the spin-lattice relaxation rate (
)
for each of the triplicated Cl(1) sites in the lock-in phase, it is suggested that
the domain peak in the incommensurate phase arises from the
tetrahedral site
with a negligible reorientational motion, whereas the other two sites
with an activated reorientational motion lead to the phase solitons.
PACS: 64.70.Rh – Commensurate-incommensurate transitions / 76.60.Gv – Quadrupole resonance
© EDP Sciences, 2000
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