Piezomagnetic Properties in Altermagnetic MnTe

Understand

We examined the piezomagnetic effect in an antiferromagnet composed of MnTe, which is a candidate material for altermagnetism with a high critical temperature.

• We observed that the magnetization develops with the application of stress and revealed that the piezomagnetic coefficient Q is 1.38$\times10^{-8}$ ${\mu}$B/MPa at 300 K.
• The poling-field dependence of magnetization indicates that the antiferromagnetic domain can be controlled using the piezomagnetic effect.
• We demonstrate that the piezomagnetic effect is suitable for detecting and controlling the broken time reversal symmetry in altermagnets.