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Title: Polaron response dominated multiferroic property in 12R-type hexagonal Ba(Ti{sub 1/3}Mn{sub 2/3})O{sub 3-δ} ceramics

We report the multiferroic properties of 12R-type hexagonal Ba(Ti{sub 1/3}Mn{sub 2/3})O{sub 3-δ} found in Mn-doped BaTiO{sub 3} series samples. Hysteresis measurements reveal the coexistence of weak ferromagnetism and ferroelectricity at room temperature. Furthermore, frequency-driven dynamic ferroelectric phase transition is disclosed around a critical frequency of 220 Hz. Analyses on the dielectric relaxation, leakage current, crystal structure, and magnetic susceptibility lead us to conclude that the response of polarons dominates the observed physical properties, and the dynamic phase transition may ascribe to the response mode changes of the localized electrons. More importantly, we figure out the crucial factors leading to difference of the ferroelectric and magnetic properties of the 12R-type Ba(Ti{sub 1/3}Mn{sub 2/3})O{sub 3-δ} samples from that of the 6H-type Ba(Ti{sub 1-x}M{sub x})O{sub 3-δ} (M = Fe, Mn) samples.
Authors:
 [1] ;  [2] ; ;  [3] ; ;  [1]
  1. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China)
  2. (Switzerland)
  3. Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001 (China)
Publication Date:
OSTI Identifier:
22494697
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 118; Journal Issue: 5; 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; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CERAMICS; CRITICAL FREQUENCY; CRYSTAL STRUCTURE; DOPED MATERIALS; ELECTRONS; FERROELECTRIC MATERIALS; FERROMAGNETISM; HYSTERESIS; LEAKAGE CURRENT; MAGNETIC SUSCEPTIBILITY; MANGANESE; PHASE TRANSFORMATIONS; POLARONS; RELAXATION; TEMPERATURE RANGE 0273-0400 K; TITANATES