Magneto-dielectric coupling and transport properties of the ferromagnetic-BaTiO{sub 3} composites
- Materials Research Laboratory, Department of Physics, Banaras Hindu University, Varanasi 221005 (India)
- AMPRI, CSIR, Bhopal 462026 (India)
- Department of Physics, NSIT, New Delhi 110078 (India)
Ferromagnetic and large magnetoresistance (MR) nanocomposites of La{sub 0.67}Sr{sub 0.33}MnO{sub 3}-BaTiO{sub 3} (LSMO-BTO) are synthesized via sol-gel route. The X-ray diffraction confirms the existence of two chemically separated phases in the composites. The maximum MR (35%) was achieved in LSMO-5% BTO (LB5). The coupling between the coexisting phases is observed from the dielectric anomaly at the ferromagnetic transition (T{sub c} = 353 K) for LB5 composition. We observed maximum magnetodielectric effect at T{sub c} of 1.18% in magnitude for LB5 and the effect of magnetic field on other composites was significant. These results are related to the large spin polarization within grains as well as at the grain boundaries and the evidence of variation in dielectric parameters with magnetic field reveal the magnetoelectric coupling in LSMO-BTO nanocomposites.
- OSTI ID:
- 22412662
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 7 Vol. 106; ISSN APPLAB; ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM COMPOUNDS
COUPLING
DIELECTRIC MATERIALS
GRAIN BOUNDARIES
LANTHANUM COMPOUNDS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETORESISTANCE
MANGANATES
NANOCOMPOSITES
SOL-GEL PROCESS
SPIN ORIENTATION
STRONTIUM COMPOUNDS
TITANATES
X-RAY DIFFRACTION