抄録
The normal-incommensurate phase transition in K2ZnCl4 was studied by neutron scattering measurements. A well-defined soft phonon behavior was not observed above the normal-incommensurate transition temperature of Ti=288°C. Diffuse scattering develops around (h, 0, l±0.3) as temperature approaches Ti from above, and the peak intensity obeys a Curie-Weiss law above Ti. The results indicate that the normal-incommensurate phase transition in K2ZnCl4 can be interpreted as an order-disorder process.
