Magnetization reversal in TmCrO3

The perovskite chromite TmCrO3 shows magnetization reversal at two temperatures. The reversal at ∼28 K is attributed to the antiparallel coupling between Tm3+ and Cr3+ moments, while that at the lower temperature (∼6–7 K) is rooted in a rotation of the magnetic moments. Magnetocaloric measurements offer a relatively large entropy change (∼4–5 J kg−1 K−1) at the lower temperature. The reversal at ∼28 K is accompanied by a sign change of an exchange-bias-like field. The absence of the training effect suggests that this behavior is rooted in unidirectional magnetic anisotropy. The existence of the two magnetization reversals offers the characteristic switching of magnetization. For example, the magnetization is flipped without changing the direction of the applied magnetic field.

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► We observed two magnetization reversals in TmCrO3.
► The reversal at 28 K is attributed to antiparallel coupling between Cr3+ and Tm3+.
► The other reversal originates from spin reorientation.
► Magnetocaloric effect is observed at the spin reorientation temperature.
► Characteristic magnetization switching is demonstrated.