کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1787952 1023457 2006 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The effect of the preparation method and grain morphology on the physical properties of A2FeMoO6 (A = Sr, Ba)
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
The effect of the preparation method and grain morphology on the physical properties of A2FeMoO6 (A = Sr, Ba)
چکیده انگلیسی

The effect of the preparation route and the grain morphology on the physical properties of A2FeMoO6 (AFMO) has been studied. Samples were prepared by solid-state reaction using the usual method but with an intermediate step in air at high temperature. Unlike previous work, we find that there is no sample degradation even after 75 days. Scanning electron microscope measurements show that the double perovskites can be formed with various grain morphologies. The electrical resistance varies by four orders of magnitude but there is no significant change in the thermoelectric power. The saturation magnetization (3.5 μB/formula unit) and (1 0 1) XRD peak intensity are identical which show that there is no difference in the Fe/Mo anti-site disorder. The results imply that the charge transport is limited by electron tunnelling between the grains and therefore directly related to the grain morphology.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Current Applied Physics - Volume 6, Issue 3, June 2006, Pages 312–315
نویسندگان
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