High Field Magnetization Measurements on CuCl₂2H₂O

Abstract

Magnetization process is precisely measured on a single crystal of CuCl₂2H₂O at 1.1 K using a pulsed magnetic field up to 180 kOe. Transitions from the antiferromagnetic to the paramagnetic states are observed at 150±2, 161±2 and 146±2 kOe when external fields are applied parallel to the a, b and c-axes, respectively. From these results, an antiferromagnetic exchange interaction along the c-axis is determined as J=3.83±0.05 cm⁻². It is also shown from a nonlinear magnetization curve that the zero-field spin reduction due to zero-point motion is 28.4±0.4%.