Room temperature multiferroic properties of Pb(Fe{sub 0.5}Nb{sub 0.5})O{sub 3}–Co{sub 0.65}Zn{sub 0.35}Fe{sub 2}O{sub 4} composites

Journal Article · Sat Dec 21 04:00:00 EST 2013 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4847595· OSTI ID:22266111

Puli, Venkata S. ^[1]; Narayan Tripathy, Satya; Pradhan, Dillip K. ^[2]; Scott, J. F. ^[3]

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1. Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118 (United States)
2. Department of Physics, National Institute of Technology, Rourkela 769008 (India)
3. Department of Physics and Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, Puerto Rico 00936 (United States)

We report the crystal structure, magnetic, ferroelectric, dielectric, and magneto-dielectric properties of [Pb(Fe{sub 0.5}Nb{sub 0.5})O{sub 3}]{sub (1−x)}[Co{sub 0.65}Zn{sub 0.35}Fe{sub 2}O{sub 4}]{sub x}: (x = 0.1, 0.2, 0.3, and 0.4) composites. Rietveld refinement results of X-ray diffraction patterns confirm the formation of these composites for all x values. All the composites show well-saturated ferroelectric and ferromagnetic hysteresis (multiferroic-composite behavior) at room temperature. With increase in Co{sub 0.65}Zn{sub 0.35}Fe{sub 2}O{sub 4} (CZFO) content an increase in saturation magnetization, and decrease in saturation polarization, remanent polarization, and dielectric constant are observed. The ferroelectric phase transition temperature increases with increase in CZFO content. All of the compositions undergo second-order ferroelectric phase transitions, which can be explained by Landau-Devonshire theory. The recoverable energy density (∼0.20 to 0.04 J/cm{sup 3}) and charge-curve energy density (∼0.84 to 0.11 J/cm{sup 3}) decrease with increase in the CZFO content. The room-temperature magneto-dielectric measurements provide direct evidence of magneto-electric coupling via strain at room temperature.

• OSTI ID: 22266111
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 23 Vol. 114; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
COUPLING
CRYSTAL STRUCTURE
ENERGY DENSITY
FERROELECTRIC MATERIALS
PERMITTIVITY
PHASE TRANSFORMATIONS
POLARIZATION
SATURATION
TRANSITION TEMPERATURE
X-RAY DIFFRACTION