X-ray diffraction study of incommensurate (N(CH3)4)2CoCl4-consequences of radiation damage

Abstract
The sequence of incommensurate/commensurate phases occurring in TMATC-Co around room temperature was studied by means of X-ray diffraction. The results changed during the course of the experiment, due to radiation damage caused by the X-ray beam. The changes included a pinning of the modulation wave into components with different wavevectors and a lowering as well as smearing of the normal to incommensurate transition temperature.