First order phase transition in the frustrated triangular antiferromagnet CsNiCl3.
作者： G. Quirion , X. Han , M. L. Plumer , M. Poirier
DOI: 10.1103/PHYSREVLETT.97.077202
关键词:
摘要: By means of high-resolution ultrasonic velocity measurements, as a function temperature and magnetic field, the nature different low temperatures phase transitions observed for quasi-one-dimensional compound CsNiCl3 is established. Special attention has been devoted to field-induced 120 degrees transition above multicritical point in H-T diagram where elastic constant C44 reveals steplike variation hysteresis effects. These results represent first experimental evidence that weakly order contradict popular notion new universality classes chiral systems.
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