We report the observation of an unexpected magnetic transition in the Kondo semimetal CeNiSn under uniaxial pressures. For P∥a, both the specific heat C and magnetic susceptibility {χ} decrease steadily with increasing P. By contrast, once P∥b and P∥c exceed 0.13 GPa, $C(T)$ exhibits a distinct jump at 4 K followed by a peak at 3 K. The concomitant peaking in χ(T) for P∥B∥c is indicative of an antiferromagnetic transition.
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Umeo et al. (1999) studied this question.
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