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Title: Dielectric investigations of polycrystalline samarium bismuth ferrite ceramic

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.
Authors:
; ;  [1] ; ;  [2]
  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)
Publication Date:
OSTI Identifier:
22395662
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 1; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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