کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1490731 992331 2010 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrical and magnetic properties of new rhodium perovskites: La2MRhO6, M = Cr, Fe, Cu
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Electrical and magnetic properties of new rhodium perovskites: La2MRhO6, M = Cr, Fe, Cu
چکیده انگلیسی

The compositions La2FeRhO6, La2CrRhO6, La2CuRhO6 were prepared for the first time, and their electrical and magnetic properties were determined. Known La2MnRhO6, La2CoRhO6, and La2NiRhO6 were also prepared and their properties determined for comparison. All six phases have the orthorhombic perovskite structure. Electrical resistivity measurements as a function of temperature indicate that all phases are semiconducting. Seebeck measurements show that all are p-type conductors. Magnetic measurements indicate general antiferromagnetic interactions for all compositions, although evidence for weak ferromagnetism is found in the case of La2CrRhO6 and La2FeRhO6. The oxidation state of M cation appears to be close to 3+ for Fe and Cr, and a mixture of 2+/3+ for Cu. A favorable combination of electrical conductivity and Seebeck coefficient results in a relatively high thermoelectric power (1.11 W/m-K2 at ∼575 K) factor for La2CuRhO6.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 45, Issue 4, April 2010, Pages 460–463
نویسندگان
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