The enhancement in dielectric and magnetic property in Na and Mn co substituted lanthanum ferrite

Journal Article · Fri May 06 00:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4946355· OSTI ID:22606423

Rai, Atma ^[1]

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1. Department of Physics, Indian Institute of Technology Patna 800013 India (India)

Nanocrystalline solid solutions of La{sub 1-x}Na{sub x}Fe{sub 1-y}Mn{sub y}O{sub 3} (x=y=0.00 and 0.25) were prepared via modified Pechini route. No evidence of secondary or impurity phase has been detected up to the detection of error limit of high power X-ray diffractometer. Dielectric property of the samples has been investigated in the frequency range 100 Hz-4MHz at temperature ranging 300–450K. The value of relative permittivity (ε{sub r}) increases drastically and shows colossal dielectric response (∼10{sup 4}) by cosubstitution of Na and Mn as compared to pure LaFeO{sub 3}. Dielectric relaxation peak in loss tangent in both samples have been found and shift towards higher frequency region as temperature increases. Magnetization-Field (M-H) loop of the calcined sample have been recorded at room temperature (300K) at field ±60kOe. Magnetic property also enhanced by co substitution of Na and Mn. The change in Fe/Mn-O-Fe/Mn angle by co-substitution of Na and Mn in LaFeO{sub 3} and indirect exchange interaction between two different magnetic sub lattices Fe and Mn might be responsible for drastic change. Saturation/maximum magnetic moment increase ∼four times in LNFM25 (5.335emu/g) as compared to pure LaFeO{sub 3} (1.302emu/g).

• OSTI ID: 22606423
• Journal Information: AIP Conference Proceedings, Vol. 1728, Issue 1; Conference: ICC 2015: International conference on condensed matter and applied physics, Bikaner (India), 30-31 Oct 2015; Other Information: (c) 2016 Author(s); 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
CRYSTALS
DETECTION
DIELECTRIC MATERIALS
FERRITES
IMPURITIES
LANTHANUM COMPOUNDS
LOSSES
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIZATION
MANGANESE ADDITIONS
NANOSTRUCTURES
PERMITTIVITY
RELAXATION
SATURATION
SODIUM ADDITIONS
SOLIDS
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
X-RAY DIFFRACTOMETERS