کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1812256 1025612 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Room temperature magnetocaloric effect of La-deficient bulk perovskite manganite La0.7MnO3−δ
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Room temperature magnetocaloric effect of La-deficient bulk perovskite manganite La0.7MnO3−δ
چکیده انگلیسی
Room temperature magnetocaloric effect in La-deficient bulk perovskite manganite La0.7MnO3−δ prepared by conventional solid-state reaction has been reported. The maximum value of the magnetic entropy change (about−1.32 J/kg K) and the refrigerant capacity (approximately close to 37 J/kg) had been obtained at 290 K corresponding to a magnetic field variation of 1 T for La0.7MnO3−δ. It is the strong Jahn-Teller coupling that changes Mn-O bond length and Mn-O-Mn bond angles and then the canted spin arrangement and induces the strong double-exchange coupling to a comparatively high magnetic transition temperature. This Curie temperature near room temperature with easy fabrication and higher chemical stability makes La0.7MnO3−δ a potential candidate as a working substance in magnetic refrigeration technology.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 406, Issue 8, 1 April 2011, Pages 1436-1440
نویسندگان
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