Effect of BiFeO3 nanoparticle on electrical, thermal and magnetic properties of polyvinyl alcohol (PVA) composite film

Journal Article · Wed Aug 15 00:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2018.01.036· OSTI ID:22804069

Halder, M.; Das, A. K.

Highlights: • Conductivity increases with increasing of BFO in PVA nanocomposite. • The resistivity of the films increases with lowering temperature. • Characteristic relaxation time increases with BFO contents in composites. • The Current-voltage characteristics of the film samples show nonlinearity. • A transformation from antiferromagnetic to diamagnetic behaviour is observed. - Abstract: Synthesis of BiFeO{sub 3} (BFO) nanoparticles (NPs) is demonstrated by sol-gel method. The fabrication of the flexible nanocomposite films based on different wt. % of BFO NPs and Polyvinyl alcohol (PVA) has been done by solution casting method. Conductivity as well as thermal stability tends to increase with the increase in wt. % of BFO filler in PVA matrix. Current-voltage characteristics of the composite films show nonlinearity which invokes the concept of back to back Schottky diode. Due to generation of recombination current and high leakage current, large value of ideality factor arises in the BFO-PVA nanocomposite film. Activation energies from dc conductivity and dielectric response have been evaluated and a decreasing trend in activation energy is observed with the increase in wt. % of BFO nanoparticle insertion in the PVA matrix. At room temperature, BFO NPs exhibit antiferromagnetic behaviour whereas BFO-PVA composite films show diamagnetism.

• OSTI ID: 22804069
• Journal Information: Materials Research Bulletin, Vol. 104; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

77 NANOSCIENCE AND NANOTECHNOLOGY
ACTIVATION ENERGY
ANTIFERROMAGNETISM
BISMUTH COMPOUNDS
CASTING
DIAMAGNETISM
DIELECTRIC MATERIALS
ELECTRIC POTENTIAL
FERRITES
LEAKAGE CURRENT
MAGNETIC PROPERTIES
NANOCOMPOSITES
NANOPARTICLES
NANOSTRUCTURES
NONLINEAR PROBLEMS
PVA
RELAXATION TIME
SCHOTTKY BARRIER DIODES
SOL-GEL PROCESS
SYNTHESIS
TEMPERATURE RANGE 0273-0400 K
THERMODYNAMIC PROPERTIES
THIN FILMS
TRANSFORMATIONS