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Title: Effect of diamagnetic barium substitution on magnetic and photovoltaic properties in multiferroic BiFeO{sub 3}

Spontaneous magnetization and photovoltaic (PV) effects have been measured in (Bi{sub 1-x}Ba{sub x})FeO{sub 3-δ} ceramics for x = 0.05, 0.10, and 0.15. The substitution of Ba{sup 2+} ion in the A site of the perovskite unit cell can effectively enhance the ferromagnetic magnetization. The heterostructure of indium tin oxide (ITO) film/(Bi{sub 1-x}Ba{sub x})FeO{sub 3-δ} ceramic/Au film exhibits significant PV effects under illumination of λ = 405 nm. The PV responses decrease with increasing Ba concentration. The maximum power-conversion efficiency in the ITO/(Bi{sub 0.95}Ba{sub 0.5})FeO{sub 2.95}/Au can reach 0.006%. A theoretical model based on optically excited current in the depletion region between ITO film and (Bi{sub 1-x}Ba{sub x})FeO{sub 3-δ} ceramics is used to describe the I-V characteristic, open-circuit voltage (V{sub oc}), and short-circuit current density (J{sub sc}) as a function of light intensity.
Authors:
 [1] ;  [1] ;  [2] ; ;  [3] ; ;  [4] ;  [5]
  1. Graduate Institute of Applied Science and Engineering, Fu Jen Catholic University, New Taipei City 24205, Taiwan (China)
  2. (China)
  3. Department of Physics, Fu Jen Catholic University, New Taipei City 24205, Taiwan (China)
  4. Department of Physics, Montana State University, Bozeman, Montana 59717 (United States)
  5. Department of Physics, National Chung Cheng University, Chia-Yi 621, Taiwan (China)
Publication Date:
OSTI Identifier:
22273902
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 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; BARIUM COMPOUNDS; BARIUM IONS; BISMUTH COMPOUNDS; CERAMICS; CONCENTRATION RATIO; CURRENT DENSITY; ELECTRIC CONDUCTIVITY; FERRITES; INDIUM COMPOUNDS; IRON OXIDES; MAGNETIZATION; PHOTOVOLTAIC EFFECT; THIN FILMS; TIN OXIDES