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Strain on cooling and heating under zero field and 1 T parallel or perpendicular to the measuring direction. The large contraction corresponds to the martensitic transformation.
(a) Magnetostriction and (b) magnetization as a function of magnetic field (at different temperatures, covering all states: austenite, premartensite and martensite), and (c) magnetostriction as a function of magnetization. It shows a quadratic behavior with respect to magnetization.
Longitudinal and transverse magnetostriction measured at temperatures just above (a) and below (b) the martensitic transformation.
(a) Saturation magnetostriction showing the large increase of their absolute value at the transitions. (b) Transverse magnetostriction values showing the change of sign at the martensitic transition.
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