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Magnetic influence on the martensitic transformation entropy in Ni-Mn-In metamagnetic alloy
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10.1063/1.4793412
/content/aip/journal/apl/102/7/10.1063/1.4793412
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/7/10.1063/1.4793412
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Thermo-magnetization curves at different fields, showing the shift of the martensitic transformation with the applied field.

Image of FIG. 2.
FIG. 2.

Isothermal magnetization curves at different temperatures, showing the magnetically induced martensitic transformation.

Image of FIG. 3.
FIG. 3.

Transformation temperature shifts with the applied field, as deduced from both isothermal and thermo-magnetization curves. The fitting curves are second order polynomials.

Image of FIG. 4.
FIG. 4.

Magnetization, ΔM, and entropy, ΔS, changes at the forward and reverse martensitic transformations. Whereas former shows a constant saturated value, the entropy change steadily decreases with the field.

Image of FIG. 5.
FIG. 5.

Entropy change at the martensitic transformation, ΔS, as a function of the generalized “order parameter” (T C-T m). Lines are guides to the eyes. The data from Ref. 10 were obtained for a different alloy, so direct correlation between the influence of atomic order and magnetic field is hardly possible, although similar behavior is observed at high magnetic fields.

Image of FIG. 6.
FIG. 6.

Inverse entropy change ΔS, as a function of the martensitic transformation width (T ms-T mf) showing good agreement with the behavior predicted by the theory, Ref. 16 .

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/content/aip/journal/apl/102/7/10.1063/1.4793412
2013-02-20
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic influence on the martensitic transformation entropy in Ni-Mn-In metamagnetic alloy
http://aip.metastore.ingenta.com/content/aip/journal/apl/102/7/10.1063/1.4793412
10.1063/1.4793412
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