Effect of Cu doping on phase transition and magnetic properties of Ni-Mn-Sb Heusler alloy
Source abstract
Abstract
In this work, the structure, phase transition and magnetic properties of Ni 49− xMn 41Sb 10Cu x ( x = 0, 3, 5, 7) Heusler alloys melted by arc melting technique were systematically investigated. It was found that the martensitic transformation of the sample occurs near room temperature, transforming from the five-layer modulation (5 M) martensite phase to the L2 1 cubic austenite phase. Magnetic measurement shows that the magnetic-structural transition of Ni 46Mn 41Sb 10Cu 3 alloy also occurs near room temperature, and it presents a large difference in magnetization between the austenite phase and martensitic phase, giving rise to a large magnetic entropy change (Δ SM = 22 J/(kg⋅K)) near room temperature. Such a considerable Δ SM around room temperature make the alloy have the potential application in magnetic refrigeration. Furthermore, the exchange bias effect of the alloys was also investigated, and it was found that with the increase of Cu content, the magnetization of the martensitic phase increases, and low coercivity (19 Oe) with the magnetizing procedure was obtained for the sample of Ni 46Mn 41Sb 10Cu 3 alloy.
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Research context
OpenAlex topics: Shape Memory Alloy Transformations · Heusler alloys: electronic and magnetic properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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