Phase transition in Bi8Fe6Ti3O27 multiferroic ceramics

• Authors: Sunanda Patri , Ram Choudhary
• Languages of publication: EN

Abstracts

EN

The polycrystalline Bi8Fe6Ti3O27 compound was prepared by a high-temperature solid-state reaction technique. Preliminary structural analysis by X-ray diffraction (XRD) confirms the formation of a single-phase compound in an orthorhombic crystal system at room temperature. The elemental content of the compound was analyzed by EDAX microanalysis. Microstructural analysis by scanning electron microscopy (SEM) shows that the compound has well defined grains, which are distributed uniformly throughout the surface of the pellet sample. Detailed studies of temperature-dependent dielectric response at various frequencies show dielectric anomalies at 380, 389 and 403°C for 10 kHz, 100 kHz, and 1 MHz respectively. The hysteresis loop observed by applying an electric field of 12 kV/cm on the poled sample with smaller remanent polarization supports the existence of ferroelectricity in this material. The value of d33 of the compound was found to be 19 pC/N.

Keywords

EN

X-ray diffraction; crystal structure and symmetry; phase transitions

Discipline

• 61.05.cp: X-ray diffraction
• 77.22.Ch: Permittivity (dielectric function)(for low-permittivity dielectric films, see 77.55.Bh; for high-permittivity gate dielectric films, 77.55.D-)
• 77.22.Gm: Dielectric loss and relaxation
• 77.84.-s: Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials(for nonlinear optical materials, see 42.70.Mp; for dielectric materials in electrochemistry, see 82.45.Un)

• Publisher: De Gruyter Open
• Journal: Open Physics
• Year: 2008
• Volume: 6
• Issue: 3
• Pages: 450-453

Dates

published

1 - 9 - 2008

online

17 - 7 - 2008

Contributors

author

Sunanda Patri

• Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur, 721 302, India

author

Ram Choudhary

• Department of Physics and Meteorology, Indian Institute of Technology, Kharagpur, 721 302, India

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Identifiers

DOI

10.2478/s11534-008-0064-7