Piezomagnetism in non-collinear antiferromagnetic Mn₃GaN free-standing membranes

Piezomagnetism is an intriguing physical phenomenon in which strain is linearly coupled to magnetic order, rather than the quadratic coupling of magnetostriction. The emergence of piezomagnetism in antiferromagnetic materials offers promising potential for applications in spintronics and piezotronics, similar to piezoelectricity. However, demonstrations under ambient conditions have been challenging, despite favorable theoretical predictions. In this work, we studied the antiperovskite Mn₃GaN, which undergoes a Γ^5g-type magnetic phase transition around the Néel temperature (T_N) of ~340 K. We successfully grew and fabricated high-quality single-crystalline Mn₃GaN free-standing membranes of large size (~5 mm²) while preserving their antiferromagnetic properties, as confirmed by detailed magnetic and transport measurements. We will discuss the magnetic response of Mn₃GaN membranes under dynamic biaxial strain.