  We study the one-dimensional supersymmetric t-J model with 1/r2 interaction
threaded by magnetic flux. Because of the long range interaction, the effect of
this flux leads to a modification of the electron hopping term. We present an
exact solution of this model for all values of the flux, concisely formulated
as a set of Bethe-ansatz-like equations. This allows a computation of the
persistent currents at zero temperature. It is found that the system violates
Leggett's conjecture despite the fact that the long range t-J model is a
special example of the Luttinger liquid university class.
