CsMn(BrxI1-x)3: Crossover from an XY to an Ising chiral antiferromagnet
Abstract
We report on high-resolution specific-heat and magnetocaloric-effect measurements of the triangular-lattice antiferromagnets CsMn(BrxI1-x)3 with different x. The evolution of the magnetic phase diagrams from the easy-axis system for x=0 to the easy-plane system for x=1 was studied in detail. The specific-heat critical exponent α of the almost isotropic x=0.19 system agrees with the value predicted for a chiral Heisenberg scenario. In an applied magnetic field (B=6 T) a crossover to a weak first-order transition is detected.
- Publication:
-
Physical Review B
- Pub Date:
- September 2001
- DOI:
- 10.1103/PhysRevB.64.094406
- arXiv:
- arXiv:cond-mat/0103011
- Bibcode:
- 2001PhRvB..64i4406B
- Keywords:
-
- 75.40.Cx;
- 75.50.Ee;
- Static properties;
- Antiferromagnetics;
- Condensed Matter - Strongly Correlated Electrons;
- Condensed Matter - Materials Science
- E-Print:
- 7 pages, 10 figures