Uniaxial pressure dependencies of the phase boundary of TlCuCl_3

N. Johannsen; A. Oosawa; H. Tanaka; A. Vasiliev; T. Lorenz

doi:10.1016/j.physb.2006.01.526

paper

Uniaxial pressure dependencies of the phase boundary of TlCuCl_3

arXiv:cond-mat/0507582 · doi:10.1016/j.physb.2006.01.526

Abstract

We present a thermal expansion and magnetostriction study of TlCuCl_3, which shows a magnetic-field induced transition from a spin gap phase to a Neel ordered phase. Using Ehrenfest relations we derive huge and strongly anisotropic uniaxial pressure dependencies of the respective phase boundary, e.g. the transition field changes by about $\pm 185$ GPa depending on the direction of uniaxial pressure.

2 pages, e figures; presented at SCES2005