Enhanced magnetoelectric properties of BiFeO{sub 3} on formation of BiFeO{sub 3}/SrFe{sub 12}O{sub 19} nanocomposites
- UGC-DAE Consortium for Scientific Research, Kolkata Centre, III/LB-8, Bidhannagar, Kolkata 700098 (India)
- Department of Physics, University of Calcutta, Kolkata 700009 (India)
Nanocomposites (NCs) comprising (1−x) BiFeO{sub 3} (BFO) and x SrFe{sub 12}O{sub 19} (SRF) (x = 0.1, 0.2, 0.3, and 0.4) have been prepared by a sol-gel route. Presence of pure phases of both BiFeO{sub 3} (BFO) and SrFe{sub 12}O{sub 19} (SRF) in the NCs for x = 0.3 and 0.4 has been confirmed by Rietveld analysis of XRD data though a minor impurity phase is observed in the case of x = 0.1 and 0.2 NCs. Transmission electron micrographs of the NCs show that particles are mostly spherical with average size of 30 nm. M-H measurements at 300 and 10 K indicate predominantly ferrimagnetic behavior of all the NCs with an increasing trend of saturation magnetization values with increasing content of SRF. Dielectric constant (ε{sub r}) of the NCs at room temperature shows a dispersive behavior with frequency and attains a constant value at higher frequency. ε{sub r} − T measurements reveal an increasing trend of dielectric constant of the NCs with increasing temperature and show an anomaly around the antiferromagnetic transition temperature of BFO, which indicates magnetoelectric coupling in the NCs. The variation of capacitance in the presence of magnetic field confirms the enhancement of magnetoelectric effect in the NCs. {sup 57}Fe Mössbauer spectroscopy results indicate the presence of only Fe{sup 3+} ions in usual crystallographic sites of BFO and SRF.
- OSTI ID:
- 22596811
- Journal Information:
- Journal of Applied Physics, Vol. 119, Issue 23; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ANTIFERROMAGNETISM
AUGMENTATION
BISMUTH OXIDES
CAPACITANCE
CRYSTALLOGRAPHY
DIELECTRIC MATERIALS
IMPURITIES
IRON 57
IRON IONS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIZATION
MOESSBAUER SPECTROMETERS
NANOCOMPOSITES
PERMITTIVITY
SOL-GEL PROCESS
SPHERICAL CONFIGURATION
TEMPERATURE RANGE 0273-0400 K
TRANSITION TEMPERATURE
X-RAY DIFFRACTION