کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7998942 1516254 2015 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetocaloric effect and critical behavior in Ni2In-type compound FeMn1−xNixGe
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Magnetocaloric effect and critical behavior in Ni2In-type compound FeMn1−xNixGe
چکیده انگلیسی
Magnetocaloric effect and critical behavior of Ni2In-type compound FeMn1−xNixGe were investigated in the present work. By partial substitution of Ni for Mn in FeMnGe, the magnetic transition temperature (TC) is tuned in a wide temperature range between 160 and 320 K with x (Ni concentration) varying from 0 to 0.4. A ferromagnet (FM) to paramagnet (PM) magnetic phase transition is observed and the magnetization has a sharp drop around respective phase transition temperature for all the compounds. The maximum magnetic entropy change is found to be 3.9 J/kg K and 4.1 J/kg K for a 5 T field change with x = 0.2 and 0.3, respectively, making them a promising candidate for magnetic refrigeration near room temperature. To investigate the nature of PM-FM phase transition, the critical behavior near TC was analyzed based on the Arrott plots. The critical values obtained with the conventional Arrott-plot procedure are very close to those predicated by the mean-field model. This suggests a long-range exchange interaction and a second order magnetic phase transition in FeMn1−xNixGe.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 639, 5 August 2015, Pages 259-262
نویسندگان
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