Dielectric investigations of polycrystalline samarium bismuth ferrite ceramic

Journal Article · Mon Jan 05 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4905344· OSTI ID:22395662

Palaimiene, E.; Macutkevic, J.; Banys, J. ^[1]; Karpinsky, D. V.; Kholkin, A. L. ^[2]

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1. Faculty of Physics, Vilnius University, Sauletekio Ave. 9, III b., LT-10222 Vilnius (Lithuania)
2. Department of Ceramics and Glass Engineering and CICECO, University of Aveiro, P-3810-193 Aveiro (Portugal)

Results of broadband dielectric investigations of samarium doped bismuth ferrite ceramics are presented in wide temperature range (20–800 K). At temperatures higher than 400 K, the dielectric properties of samarium bismuth ferrite ceramics are governed by Maxwell-Wagner relaxation and electrical conductivity. The DC conductivity increases and activation energy decreases with samarium concentration. In samarium doped bismuth ferrite, the ferroelectric phase transition temperature decreases with samarium concentration and finally no ferroelectric order is observed at x = 0.2. At lower temperatures, the dielectric properties of ferroelectric samarium doped bismuth ferrite are governed by ferroelectric domains dynamics. Ceramics with x = 0.2 exhibit the relaxor-like behaviour.

• OSTI ID: 22395662
• Journal Information: Applied Physics Letters, Vol. 106, Issue 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
BISMUTH COMPOUNDS
CERAMICS
CONCENTRATION RATIO
DIELECTRIC PROPERTIES
DOPED MATERIALS
ELECTRIC CONDUCTIVITY
FERRITES
FERROELECTRIC MATERIALS
PHASE TRANSFORMATIONS
POLYCRYSTALS
RELAXATION
SAMARIUM COMPOUNDS
TEMPERATURE DEPENDENCE
TRANSITION TEMPERATURE