Distinct roles of the triplicated tetrahedra in phase soliton formation and residual commensurations in
Department of Physics, Korea University - Seoul 136-701, Korea
2 Department of Physics, Pusan National University - Pusan 609-735, Korea
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