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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.
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Fjær et al. (1985) studied this question.
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