Abstract
From a heat capacity ( ) measurement on a single crystal sample of the quasi-one-dimensional (Q1D) Heisenberg antiferromagnet (HAF) in applied magnetic fields, we found an anomaly which is indicative of a magnetic long-range ordering. We were able to follow how the position of the anomaly in changes with temperature and magnetic field ( ). An experimental phase diagram of an Q1D HAF is obtained and compared with that of the corresponding classical system.
- Received 15 April 1998
DOI:https://doi.org/10.1103/PhysRevLett.81.2566
©1998 American Physical Society