A series of La substituted MgCuZn ferrite powders (Mg0.35Cu 0.05Zn0.60LaxFe2-xO 4 with, x = 0.00, 0.01, 0.03 and 0.05) were synthesized by a novel microwave sintering method. The effect of La-substitution on the structural, physical and magnetic properties has been studied. X-ray diffraction confirmed the formation of single phase cubic spinel lattice for all the compositions studied. The lattice constant increased with increasing La content, might be attributed to the larger ionic radius of La3+ than the Fe 3+. X-ray density of each sample is higher than the corresponding bulk density of sintered sample. The grain size was estimated using SEM micrographs. Room temperature saturation magnetization and magnetic initial permeability were found to increase with La substitution in Fe up to x = 0.01 and then decreased. The role of lanthanum in modifying structural and magnetic properties of microwave treated MgCuZn ferrites system has been explained suitable.© 2013 Elsevier Ltd. All rights reserved.

Madhuri W

Department of Physics

School of Advanced Sciences

Vellore Campus

Venkataramana B

Department of Mathematics

Penchal Reddy M

Kim I.G

Yoo D.S

Shaaban A

Ramamanohar Reddy N

Siva Kumar K.V

Ramakrishna Reddy R.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Superlattices and Microstructures

The effect of zinc ion substitution for nickel on structural and magnetic properties of NiZn ferrites is reported. The spinel ferrite system N i1-xZn xFe 2O 4 with x0 0.2, 0.3, 0.4 and 0.5 was prepared by microwave sintering method. The uniaxially pressed samples were sintered at various temperatures such as 900°C, 1000°C and 1100°C for 30 min. X-ray diffraction patterns of the samples indicate the formation of single-phase cubic spinel structure. SEM micrographs show that grain size increases with increasing zinc content and sintering temperature. The elemental composition of these ferrites was analyzed by EDS. Lattice constant increases with increase in zinc content, obeying Vegard's law. The effect of composition and sintering temperature on initial permeability as the function of frequency and temperature was studied. The initial permeability of NiZn ferrite increases greatly with increasing Zn content and sintering temperature. The dependence of initial permeability with respect to temperature shows the decrease in the Curie point with increase in zinc content, is the normal behavior of ferrites. The relative loss factor (δ/μ i of the order of 10 -2 to 10 -5 in the frequency range from 100 Hz to 1 MHz indicates that the prepared ferrites have relatively high purity. © 2012 The Author(s).

Journal of Electroceramics

Magnetic properties of Ni-Zn ferrites prepared by microwave sintering method

Polycrystalline MgCuZn ferrites with chemical formula Mg 0.50-xCuxZn0.50Fe2O4 (x = 0.00, 0.05, 0.10, 0.15, 0.20, 0.25 and 0.30) were prepared by microwave sintering method. These powders were calcined, compacted and sintered at 950 °C for 30 min. Structural, microstructural and elemental analyses were carried out using X-ray diffraction (XRD), scanning electron microscope (SEM) and energy dispersive X-ray spectrometry (EDS), respectively. The lattice parameter is found to increase with increasing copper content. A remarkable densification is observed with the addition of Cu ions in the ferrites. The sintered ferrite was characterized for initial permeability, dielectric constant and dielectric loss tangent and ac conductivity measurements. The temperature variation of the initial permeability of these samples was carried out from 30 °C to 200 °C. The dielectric constant, dielectric loss tangent and ac conductivity have been measured in the frequency range of 100 Hz to 1 MHz. Initial permeability and dielectric constant were found to increase and dielectric loss decreased with Cu substitution for Mg, up to x = 0.20. The ferrite powder prepared is suitable for the application in multilayer chip inductor due to its low-temperature sinterability, good magnetic properties and low loss at high frequency. © 2010 Elsevier B.V.

Materials Science and Engineering C

Influence of copper substitution on magnetic and electrical properties of MgCuZn ferrite prepared by microwave sintering method

Ceramics International

On the structural and magnetic properties of La-substituted NiCuZn ferrites prepared using egg-white

Journal of Materials Science: Materials in Electronics

High permeability and stress insensitivity of MgCuZn–NiCuZn ferrite composites for microinductor applications

Journal of Magnetism and Magnetic Materials

Study on electro-magnetic properties of La substituted Ni–Cu–Zn ferrite synthesized by auto-combustion method

Effect of La substitution on structural and magnetic properties of microwave treated Mg0.35Cu0.05Zn0.60LaxFe2−xO4 ceramics

Journal	Data powered by TypesetSuperlattices and Microstructures
Publisher	Data powered by TypesetElsevier BV
ISSN	0749-6036
Open Access	0