کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1592806 1002674 2012 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Frequency dependence of electrical and magnetic properties of Li–Ni–Mn–Co ferrites
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
Frequency dependence of electrical and magnetic properties of Li–Ni–Mn–Co ferrites
چکیده انگلیسی

Substituted Li-ferrites with compositional formula Li0.45−x/2Ni0.1Mn0.1CoxFe2.35−x/2O4 with xx ranging from 0 to 0.1 in steps of 0.02 were prepared by the conventional ceramic technique. The single-phase spinel structure of the samples was confirmed by XRD analysis. The lattice constant was observed to increase with the increase of the Co2+ substitution. The dielectric constant, ε′ε′ and dielectric loss tangent, tan δδ was studied as a function of frequency in the range 100 Hz to 1 MHz. A decrease is observed in the value of ε′ε′ with substitution at lower frequencies. ε′ε′ showed a dispersive behavior with frequency for all the samples. The frequency dependence of tan δδ showed a resonance peak. The magnetic properties viz initial permeability and magnetic loss were also studied as a function of frequency. The possible mechanisms contributing to the results have been discussed.


► The influence of Co2+ substitution on some properties of Li–Ni–Mn ferrites is studied.
► Co2+ significantly influences the structural properties even with small substitutions.
► The frequency dependence dielectric constant showed dispersion at low frequency.
► Maximum of tanδtanδ is significantly influenced by Co2+ content.
► Frequency dependence of permeability showed operational limit ∼2–5 MHz.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Communications - Volume 152, Issue 4, February 2012, Pages 320–323
نویسندگان
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