Ferroelectric Domain Scaling and Switching in Ultrathin BiFeO3 Films Deposited on Vicinal Substrates

Abstract

We report on electrically switchable polarization and ferroelectric domain scaling over a thickness range of 5-100 nm in BiFeO3 films deposited on [110] vicinal substrates. The BiFeO3 films of variable thickness were deposited with SrRuO3 bottom layer using the pulsed laser deposition technique. The domains are engineered into preferentially oriented patterns due to substrate vicinality along the [110] direction. The domain width scales closely with the square root of film thickness, in agreement with the Landau Lifschitz Kittel (LLK) law. Switching spectroscopy piezo-response force microscopy provides clear evidence for the ferroelectric switching behavior in all the films.

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Document Details

Document Type
Technical Report
Publication Date
May 25, 2012
Accession Number
ADA562497

Entities

People

  • Arthur Baddorf
  • Arunava Gupta
  • Dipanjan Mazumdar
  • Sergei V. Kalinin
  • Stephen Jesse
  • Vilas Shelke

Organizations

  • University of Alabama

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Crystal Lattices
  • Cubic Lattices
  • Domain Walls
  • Electronic Mail
  • Ferroelectric Domains
  • Films
  • Materials
  • Materials Science
  • Physics
  • Polarization
  • Square Roots
  • Substrates
  • Switching
  • Thick Films
  • Thickness
  • Thin Films
  • Three Dimensional

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Nanofabrication and Microfabrication.
  • Thin Film Deposition Science.

Technology Areas

  • Directed Energy
  • Directed Energy - Pulsed-Laser Deposition