In this study the magnetic order of the spin-1/2 XXZ chain system Cs2CoCl4 in a temperature range from 50 mK to 0.5 K and in applied magnetic fields up to 3.5 T is investigated by high-resolution measurements of the thermal expansion and the specific heat. Applying magnetic fields along a or c suppresses TN completely at about 2.1 T. In addition, we find an adjacent intermediate phase before the magnetization saturates close to 2.5 T. For magnetic fields applied along b, a surprisingly rich phase diagram arises. Two additional transitions are observed at critical fields μ0HSF1â‰f0.25T and μ0HSF2â‰f0.7T, which we propose to arise from a two-stage spin-flop transition.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - 28 Jan 2015|