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Title: Tunable atomic termination in nano-necklace BiFeO{sub 3}

We investigate the growth kinetics of BiFeO{sub 3} (BFO) nano-necklace based on first principles modeling and electrospinning experiments. A two-step layered growth mechanism is proposed to control the atomic termination of each nano-necklace. X-ray diffraction (XRD) results agree well with our model predictions; (1) samples calcined at 500 and 550 °C consist of FeO{sub 2} (F-F) terminated nano-necklace, (2) samples calcined at 650 °C consist of either BiO (B-B) or BiO and FeO{sub 2} (B-F) terminated ones. The XRD diffraction peaks are located at lower 2θ values with a magnetic moment of 3.0 emu/g for the former and at higher 2θ values with a decrease in the magnetic moment to 0.4 emu/g for the later samples. The activation energy associated with the growth of the nano-necklaces was experimentally determined to be 0.37 eV/atom. This study provides fundamental understanding for the long-sought layer-by-layer assembly of BFO nanostructures.
Authors:
; ; ; ;  [1]
  1. Entropic Interface Group (EIG), Engineering Product Development, Singapore University of Technology and Design (SUTD), 20 Dover Drive (Singapore)
Publication Date:
OSTI Identifier:
22283222
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 5; 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; 77 NANOSCIENCE AND NANOTECHNOLOGY; ACTIVATION ENERGY; BISMUTH OXIDES; COMPUTERIZED SIMULATION; CRYSTAL GROWTH; FERRITES; IRON OXIDES; LAYERS; MAGNETIC MOMENTS; NANOSTRUCTURES; X-RAY DIFFRACTION