کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1613924 | 1516320 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of Ni2+ substitution on the structural, dielectric and magnetic properties of Cu-Cd ferrite nanoparticles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Nanoparticles with compositions of Cu0.4â0.5xCd0.2Ni0.4+xFe2â0.5xO4 (0.0 ⩽ x ⩽ 0.5) were successfully synthesized by a citrate-nitrate sol-gel auto combustion route. The combusted powder was calcinated at four hours in a furnace and then slowly cooled to room temperature. The analysis methods of FTIR, XRD, FESEM, VSM and dielectric measurements were used to characterize prepared magnetic particles. The effect of Ni2+ substitution on structural, magnetic and dielectric properties of Cu-Cd ferrite nanoparticles was studied. The comprehensive studies on compositional and frequency dependent dielectric properties were carried out by means of AC conductivity (Ïac), imaginary dielectric constant (εâ²â²), loss tangent (tan δ), impedance and dielectric modulus (real and imaginary) measurements in frequency range of 50 Hz-5 MHz at room temperature. The structural properties investigated by using X-ray diffraction, scanning electron microscopy, and Fourier transform infrared spectroscopy. X-ray diffraction pattern and FTIR results revealed that synthesized samples are in single phase. It is observed that the dielectric constant (εâ²â²) and dielectric loss (tan δ) value decreases with increase in Ni2+ concentration (x). At low frequency the Maxwell type interfacial polarization was observed. Magnetization measurement shows that the Curie temperature of the samples increases with Ni2+ concentration, which is explained by a change in the A-O-B super exchange interaction.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 573, 5 October 2013, Pages 198-204
Journal: Journal of Alloys and Compounds - Volume 573, 5 October 2013, Pages 198-204
نویسندگان
Mohd. Hashim, Alimuddin Alimuddin, Sagar E. Shirsath, R.K. Kotnala, Sher Singh Meena, Shalendra Kumar, Aashis Roy, R.B. Jotania, Pramod Bhatt, Ravi Kumar,