Ni₂FeGa₁₋ₓZnₓ Heusler alloys

Pressure-tunable magnetic phase transitions

Pressure-tunable martensitic transformation temperature for designing pressure-sensitive magnetic shape memory alloy sensors.

Jiale, Luo · Gao, Qiang · Ma, He · Hao, Wu · Ning, Wang · Shiyuan, Han · Tingxian, Zhao · Ji, Liang · Jin, Xin

Physics Letters, Section A: General, Atomic and Solid State Physics 2026

Advantages

Pressure-tunable transition

Hydrostatic pressure can shift the martensitic transformation temperature linearly or quadratically, enabling device operation over a wide temperature range via mechanical loading.

Guide composition design

The calculations reveal composition-dependent pressure response, allowing designers to preselect suitable alloy compositions without extensive trial synthesis.

Applications

• Magnetic shape memory sensors：Exploit pressure-tuned transformation temperature to alter sensor response under varying hydrostatic loads.
• Pressure sensors：Transformation temperature is pressure-sensitive, enabling direct use as a pressure-sensing element.
• Shape memory alloys：Provide pressure–transformation design guidance for multicomponent shape memory alloys.