Abstract
Magnetization of a large single crystal was measured as functions of applied field and temperature. At K, a discontinuity in susceptibility was observed. The relative change in total moment is 1.2%, independent of applied field to within experimental accuracy. This discontinuity is attributed to the change in the intramolecular geometry at the orientational order-disorder transition. This is the first experimental demonstration that the cooperative phase transition affects the magnetic susceptibility of a single molecule.
- Received 21 March 1994
DOI:https://doi.org/10.1103/PhysRevLett.73.186
©1994 American Physical Society