Metamagnetism in CeIrIn5: Magnetoresistance and dHvA investigation
We investigated the magnetoresistance and de-Haas-van-Alphen effect (dHvA) in CeIrIn5 for magnetic fields up to 45 T and in the temperature range 0.03-1 K. A concomitant drop in the resistivity and in the amplitude of the dHvA oscillations mark the onset of the metamagnetic transition at 28 T for field parallel to [0 0 1]. Both features are gradually suppressed when the field is rotated away from [0 0 1]. There is no significant change in the dHvA frequencies and the cyclotron effective masses, at odds with other known metamagnetic systems. © 2007.