Abstract
Present and future applications for Fe50Ni50 type alloys are dependent on an ever-improving mastery of the shape of the hysteresis cycle and/or the best use of these quantities when approaching the Curie point Tc. A metallurgical solution exists to trigger anomalous grain growth at a thickness of 0.8 mm, allowing for the achievement of a coercive field less than 1.5–2 A/m which can further improve torque sensor accuracy. The lowering of Jr to reinforce the safety and efficiency of certain electromechanical actuators is obtained by adding elements, interpreted as magnetoelastic effect related to lattice deformations. The joint selection of Tc, the magnetic properties and the thermal and electromagnetic environmental conditions of the material will soon make it possible to achieve effective temperature regulations through the very nonlinear signature of the inductance as a function of temperature T at the approach of Tc.
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