Specific-heat study of the triangular-lattice antiferromagnet RbCuCl3
Physikalisches Institut, Universität Karlsruhe, Engesserstrasse 7, 76128 Karlsruhe, Germany
2 Hahn-Meitner-Institut, 14109 Berlin, Germany
3 Department of Physics, Faculty of Science, Tokyo Institute of Technology, Tokyo 152, Japan
Published online: 15 May 2000
We report on the magnetic phase diagram of the distorted triangular-lattice antiferromagnet RbCuCl3 for a magnetic field applied parallel to the basal plane (B⊥c). High-resolution measurements of the specific heat and of the magnetocaloric effect have been performed in magnetic fields up to 14 T. The high-field specific-heat data reveal the existence of an intermediate phase between the paramagnetic and the frustrated antiferromagnetic phase.
PACS: 75.40.Cx – Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.) / 75.50.Ee – Antiferromagnetics / 64.60.Fr – Equilibrium properties near critical points, critical exponents
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2000