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Naji, M. |
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Motta, Antonella |
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Ali, M. A. |
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Azevedo, Nuno Monteiro |
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Alonso, J. I. García
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article
Stress-induced curie temperature increase in the Fe64Ni 36 invar alloy
Abstract
<p>Structural and magnetic changes on invar Fe64Ni36 alloy (T<sub>C</sub> = 500 K) produced by mechanical milling followed by heating up to 1073 K, were investigated by neutron diffraction, magnetization measurements, X-ray diffraction under high pressures and X-ray absorption at both Fe and Ni K-edges. We argue that the strain induced in the Fe<sub>64</sub>Ni<sub>36</sub> material after this treatment mainly affects the Fe sites due to the magnetovolume coupling, the most notorious feature being the increase of the Curie temperature (ΔT<sub>C</sub> = 70 K).</p>