  In this paper we investigate the nonlocal correlation (beyond entanglement)
captured by measurement induced nonlocality and geometric quantum discord for a
pair of interacting spin-1/2 particles at thermal equilibrium. It is shown that
both the measures are identical in measuring the correlation. We show the
possibility of nonlocal correlation between the spins without entanglement,
which ceases to exist only for the maximal mixture of product bases. We also
observe that while interaction between the spins is responsible for the
enhancement of correlation, this non-classicality decreases with the
intervention of external magnetic field.
