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

doi:10.1103/PhysRevB.91.024423

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

^*Corresponding author for this work

School of Physics and Astronomy

University of Cologne

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

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 language	English
Article number	024423
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	91
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevB.91.024423
State	Published - 28 Jan 2015

Funding

Funders	Funder number
Deutsche Forschungsgemeinschaft	SFB 608, FOR 960

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10.1103/PhysRevB.91.024423

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title = "Low-temperature ordered phases of the spin- 12 XXZ chain system Cs2 CoCl4",

abstract = "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 μ0HSF1{\^a}‰f0.25T and μ0HSF2{\^a}‰f0.7T, which we propose to arise from a two-stage spin-flop transition.",

author = "O. Breunig and M. Garst and A. Rosch and E. Sela and B. Buldmann and P. Becker and L. Bohat{\'y} and R. M{\"u}ller and T. Lorenz",

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AU - Breunig, O.

AU - Garst, M.

AU - Rosch, A.

AU - Sela, E.

AU - Buldmann, B.

AU - Becker, P.

AU - Bohatý, L.

AU - Müller, R.

AU - Lorenz, T.

PY - 2015/1/28

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N2 - 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.

AB - 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.

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

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