Low-temperature ordered phases of the spin- 12 XXZ chain system Cs2 CoCl4

O. Breunig, M. Garst, A. Rosch, E. Sela, B. Buldmann, P. Becker, L. Bohatý, R. Müller, T. Lorenz

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Article number024423
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number2
StatePublished - 28 Jan 2015


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