کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8156728 1524847 2015 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic properties and magnetocaloric effect in Ni-Mn-Sn alloys
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Magnetic properties and magnetocaloric effect in Ni-Mn-Sn alloys
چکیده انگلیسی
Magnetic and magnetocaloric properties in Ni50Mn50−xSnx alloys with wide range of the Sn-concentration (x=0-40) were investigated. The alloys were prepared by arc-melting and subsequently annealing at 850 °C for 4 h. The X-ray diffraction analyses manifest the formation of the crystalline phases (Ni2MnSn, NiMn, Ni3Sn2, Mn3Sn, and MnSn2) in the alloys with various compositions and fabrication conditions. With increasing x, the saturation magnetization first increases from near zero (at x=10) to above 40 emu/g (at x=20) and then decreases to below 10 emu/g (at x=40) for both the as-melted and annealed cases. The martensitic-austenitic transition was observed in the alloys with a narrow range of x (13-15). The magnetic transitions in the alloy can be controlled by changing Sn-concentration. The alloy reveals both the positive and negative entropy changes with quite large magnitude (∆Sm>1 J/kg K with ∆H=12 kOe) with appropriate compositions and annealing conditions.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Magnetism and Magnetic Materials - Volume 374, 15 January 2015, Pages 372-375
نویسندگان
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