Effect of aluminum substitution on structural and electromagnetic properties of nanocrystalline MgCuMn ferrites

Journal Article · Wed Jun 24 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4918194· OSTI ID:22490581

Kumar, S. Senthil; Shinde, R. S. ^[1]; Murthy, S. R. ^[2]

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1. Ferrite Laboratory, Raja Ramanna Centre for Advanced Technology, Indore-452013 (India)
2. Department of Physics, Osmania University, Hyderabad-500007 (India)

The effect of substitution of nonmagnetic Al{sup 3+} ions on the structural and electromagnetic properties were studied in nanocrystalline ferrite series of Mg{sub 0.8}Cu{sub 0.2}Al{sub x}Fe{sub 1.95-x}Mn{sub 0.05}O{sub 4} where x varies 0-0.4 in steps of 0.1. This series was synthesized by using microwave hydrothermal method. The nanocrystalline ferrite phase was observed at temperature 150°C/40 min. Synthesized powders were characterized using X-ray diffraction (XRD) and transmission electron microscopy (TEM). The synthesized powders were densified using microwave sintering method at 950°C/40 min. The sintered samples were characterized using XRD. Surface morphology was observed by using field effective scanning electron microscopy (FESEM). The electrical and magnetic properties were measured at room temperature. These results led us to interfere that the values of d.c resistivity increases and dielectric constant, initial permeability, saturation magnetization and Curie temperature were observed to be decreased with the substitution of Al{sup 3+} ions with those of Fe{sup 3+}. The low dielectric and magnetic losses and low magnetization exhibited by aluminum substituted MgCuMn ferrites makes them find applications in microwave devices.

• OSTI ID: 22490581
• Journal Information: AIP Conference Proceedings, Vol. 1665, Issue 1; Conference: 59. DAE solid state physics symposium 2014, Tamilnadu (India), 16-20 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER COMPOUNDS
CRYSTALS
CURIE POINT
DIELECTRIC MATERIALS
FERRITES
HYDROTHERMAL SYNTHESIS
IRON COMPOUNDS
MAGNESIUM COMPOUNDS
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANATES
MICROWAVE RADIATION
NANOSTRUCTURES
PERMITTIVITY
POWDERS
SCANNING ELECTRON MICROSCOPY
SINTERING
TEMPERATURE RANGE 0273-0400 K
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION