Exchanged biased molecular clusters

A Supramolecular Aggregate of Four Exchange-Biased Single-Molecule Magnets.
Tu N. Nguyen, Wolfgang Wernsdorfer,  Khalil A. Abboud, and George Christou
JACS 133, 20688 (2011)

Hysteresis loops in plots of magnetization vs dc field for a single crystal of 3·xCH2Cl2 (top) at the indicated temperatures at 0.28 T/s and (bottom) at the indicated field scan rates at 0.04 K. M is normalized to its saturation value, MS.