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Product Summary of Magnetic Shape Memory Material Datasheet
Goodfellow is delighted to announce the addition of an exciting new product to our range – Magnetic Shape Memory Material. This patented NiMnGa single crystal material has some extremely innovative properties:
Properties
Material |
NiMnGa single Crystal |
Density |
8 g cm-3 |
Melting point |
1130°C |
Elongation in Magnetic Field |
Up to 6%, typically 3 to 5% |
Response |
Up to 1 to 2 kHz |
Force Density |
About 2 MPa |
Work Output (force x stroke) |
Max 100 kJ/m3 |
Fatigue Life |
Several hundred million cycles |
Magnetic Field |
<0.8T |
Maximum Operating Temperature |
45°C |
Temperature – Austenite Transformation |
50°C |
Temperature – Martensite Transformation |
50°C |
Curie Temperature |
95-105°C |
Crystallisation point |
1090°C |
Coefficient of thermal expansion |
20 x10-6 K-1 (@20-100°C) |
Thermal diffusivity |
4.4 mm2 s-1 (@ 22°C) |
Thermal conductivity |
16 W m-1 K-1 (@ 22°C) |
Electrical resistivity |
70 µOhm cm |
Temperature coefficient |
0.003 K-1 |
Modulus of elasticity1 |
8-20 GPa |
Hardness - Vickers |
130 |
Compression stress |
>700 MPa |
Initial permeability (hard axis) |
2 |
Maximum permeability (easy axis) |
90 |
Coercivity, Hc |
4000 A m-1 |
Activation field strength2 |
150 kA m-1 |
Saturation flux density2 |
0.6 T |
Remanence from saturation |
0.02 T |
1 Modulus derived from the compression stress curve of the single variant sample
2 @ 0 MPa stress
Fast Response to Control Signal
Strain versus field example curves at various pre-stress levels measured at 22°C
Stress versus strain example curve measured at 22°C
Instructions

Please pay attention to the following instructions:
- Do not heat the sample above 45 °C.1
- Do not apply stresses above 5 MPa to the material1
- Do not bend, or otherwise apply non-uniform stresses, to the material.1
- Do not apply field or stress on the surface marked as “D” above.1
- Apply uniform magnetic field in the direction perpendicular to the surface indicated with a blue dot.
- We recommend recording the mechanical, thermal and magnetic history of each sample.
1The material will not be destroyed, however it might change its twin structure. This can be easily restored by trained personnel.
Literature
- E. Pagounis, Mater. Sci. Eng. R 56, 33 (2007).
- O. Heczko, L. Straka, J. Appl. Phys. 94, 7139 (2003).
- E. Pagounis, M. Laufenberg, Proceedings 12th International Conference on New Actuators, ACTUATOR 2010, pp. 731-733, 14-16.6.2010, Bremen, Germany.
- E. Pagounis, A. Laptev, J. Jungwirth, M. Laufenberg, M. Fonin, Scripta Mater. 88, 17 (2014).
Please click here for an introduction and applications. Alternatively, if you would like to know more about this material, please send us an e-mail or telephone us using the numbers on our contact page.
Please click here for our standard catalogue dimensions and prices.