Low-temperature ordered phases of the spin-1/2 XXZ chain system Cs2CoCl4

被引：11

作者：

Breunig, O. ^{[1
]}

Garst, M. ^{[2
]}

Rosch, A. ^{[2
]}

Sela, E. ^{[2
,3
]}

Buldmann, B. ^{[2
]}

Becker, P. ^{[4
]}

Bohaty, L. ^{[4
]}

Mueller, R. ^{[1
]}

Lorenz, T. ^{[1
]}

机构：

[1] Univ Cologne, Inst Phys 2, D-50937 Cologne, Germany

[2] Univ Cologne, Inst Theoret Phys, D-50937 Cologne, Germany

[3] Tel Aviv Univ, Raymond & Beverly Sackler Sch Phys & Astron, IL-69978 Tel Aviv, Israel

[4] Univ Cologne, Inst Kristallog, D-50939 Cologne, Germany

来源：

PHYSICAL REVIEW B | 2015年 / 91卷 / 02期

关键词：

QUANTUM; TRANSITION; HEAT;

D O I：

10.1103/PhysRevB.91.024423

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 T-N 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 mu H-0(SF1) similar or equal to 0.25 T and mu H-0(SF2) similar or equal to 0.7 T, which we propose to arise from a two-stage spin-flop transition.

引用

页数：10

共 25 条

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