HIGH-PRESSURE STUDY OF FE3O4 THROUGH THE VERWEY TRANSITION

The thermopower (TEP) and electrical resistance of stoichiometric Fe3O 4 crystals have been measured up to pressures of 6 GPa over the temper ature range of 80-160 K. The resistance decreases markedly with increa sing pressure below the Verwey transition temperature T-v and T-v decr eases linearly with increasing pressure. The magnitude of the TEP as w ell as the discontinuity at T-v decrease with increasing pressure. The thermopower of Fe3O4 shows an interesting upswing at low temperatures (< 100 K) which is affected significantly by pressure.