Detection of entangled states from experimental magnetic susceptibility is reported for an
organic radical. The present system exemplifies an ideal spin 1/2 chain with full isotropy.
Experimental susceptibility data are modelled by the formulation described by Bonner and
Fisher. An explicit correlation is established between the molecular structure and the spin
chain interaction. Using experimental magnetic susceptibility as entanglement witness,
entanglement is observed to exist up to 28 K in the present system. Evolution of …