کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1622765 | 1516395 | 2009 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Studies on structural and electrical properties of Co1âxNixFe1.9Mn0.1O4 ferrite
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Nickel-doped iron-deficient cobalt ferrite with small amount of manganese having the chemical composition Co1âxNixFe1.9Mn0.1O4, with x = 0.2, 0.4, 0.6 and 0.8, were prepared by standard double sintering ceramic method. The spinel phase formation was confirmed by X-ray diffraction (XRD). The DC resistivity measurements with temperature indicate a semiconducting behavior showing a linear decrease with increasing temperature and the doping of Ni enhances the resistivity. Maximum resistivity of the order of 109 Ω cm was found for composition x = 0.8. Room temperature dielectric constant measurements with frequency (100 Hz to 1 MHz), show usual dielectric dispersion. Also, the variation of room temperature AC conductivity as a function of frequency were studied and explained by using Maxwell-Wagner two-layer model. The studies on dielectric constant (Éâ²), loss tangent (tan δ) and AC conductivity (ÏAC), at four different frequencies (viz., 1, 10, 100 kHz and 1 MHz), with temperature were made.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 482, Issues 1â2, 12 August 2009, Pages 276-282
Journal: Journal of Alloys and Compounds - Volume 482, Issues 1â2, 12 August 2009, Pages 276-282
نویسندگان
P.A. Shaikh, R.C. Kambale, A.V. Rao, Y.D. Kolekar,