Magnetoexcitons in Zn0.98Mn0.02Te under high hydrostatic pressure

We have measured low-temperature photoluminescence spectra of cubic Zn0.98M n0.02Te in high magnetic fields up to 14 T and at hydrostatic pressures up to 3 cpa. From the variation with pressure of the Zeeman shift of the excit onic recombination at the fundamental band gap we determine the volume depe ndence of the hole-ion exchange interaction and the effective superexchange temperature parameter of the magnetic ions. We find a strikingly large inc rease of both parameters with pressure, which can be explained by assuming a larger local compressibility near Mn ions compared to the bulk elastic pr operties of the ZnTe host lattice.