کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1476453 1510146 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Magnetic properties of Cu1+xMn2−xO4 and Ni1+xMn2−xO4 solid solutions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Magnetic properties of Cu1+xMn2−xO4 and Ni1+xMn2−xO4 solid solutions
چکیده انگلیسی
Magnetic properties of two spinel oxides solid solutions, Cu1+xMn2−xO4 and Ni1+xMn2−xO4, are reported. These series are characterized by two magnetic transitions: the upper one, of ferrimagnetic type, occurs at about 85 K (for copper-based) and at 105-110 K (for nickel-based spinels), independently of the x-content; the lower transition may be related to a Néel-type collinear ordering and takes place at 30 and 45 K, respectively. Application of moderate fields (H > 250 Oe) make both transitions to merge into one broad maximum in the magnetization, which takes place at lower temperature when applying larger fields. Magnetization cycles with temperature (ZFC/FC) or field (loops) allowed us to well characterize the ordered state. The effective moment follows the expected behavior when manganese ions are being substituted by ions of lower magnetic moment (Ni2+ and Cu2+).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 27, Issues 13–15, 2007, Pages 3911-3914
نویسندگان
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