کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1624959 1516420 2008 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fabrication and magnetic characteristic of ferrimagnetic bulk Mn4N
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Fabrication and magnetic characteristic of ferrimagnetic bulk Mn4N
چکیده انگلیسی

We have successfully fabricated ferrimagnetic bulk Mn4N by doping bulk Mn metal with nitrogen at 900 °C in a flow of NH3/N2 mixture gas. The X-ray diffraction pattern of bulk Mn4N shows a pure Mn4N phase. By magnetic measurements using VSM and SQUID, the hysteresis loop of the bulk Mn4N at 5 and 300 K, together with the M–T curve from 2 to 1000 K at 2 kOe external field is measured. From the 1/χ–T curve, it can be concluded that the sample is ferrimagnet with its Curie temperature around 740 K. The magnetic moment is calculated to be about 0.88 μB/cell at 5 K. The microwave characteristic was investigated by the vector network analyzer in the frequency from 2 to 12 GHz and was fitted by the transmission line theory. We have given the calculated results for the sample thickness of 1.4, 1.5 and 1.9 mm, respectively, by using the electromagnetic parameters of the Mn4N composite. The loss peak shifts to lower frequency with the increasing of composite thickness.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 457, Issues 1–2, 12 June 2008, Pages 57–60
نویسندگان
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