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Title: Thin film bismuth iron oxides useful for piezoelectric devices

The present invention provides for a composition comprising a thin film of BiFeO.sub.3 having a thickness ranging from 20 nm to 300 nm, a first electrode in contact with the BiFeO.sub.3 thin film, and a second electrode in contact with the BiFeO.sub.3 thin film; wherein the first and second electrodes are in electrical communication. The composition is free or essentially free of lead (Pb). The BFO thin film is has the piezoelectric property of changing its volume and/or shape when an electric field is applied to the BFO thin film.
Inventors:
; ;
Issue Date:
OSTI Identifier:
1255124
Assignee:
The Regents of the University of California (Oakland, CA) LBNL
Patent Number(s):
9,356,224
Application Number:
12/916,209
Contract Number:
AC02-05CH11231
Resource Relation:
Patent File Date: 2010 Oct 29
Research Org:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Other works cited in this record:

Multiferroics progress and prospects in thin films
journal, January 2007
  • Ramesh, R.; Spaldin, Nicola A.
  • Nature Materials, Vol. 6, Issue 1, p. 21-29
  • DOI: 10.1038/nmat1805

A mechanism for the 150 µC cm−2 polarization of BiFeO3 films based on first-principles calculations and new structural data
journal, January 2006
  • Ricinschi, Dan; Yun, Kwi-Young; Okuyama, Masanori
  • Journal of Physics: Condensed Matter, Vol. 18, Issue 6, p. L97-L105
  • DOI: 10.1088/0953-8984/18/6/L03

Isosymmetric structural phase transitions: phenomenology and examples
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  • DOI: 10.1107/S0108768195001728

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journal, August 2004
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  • Chemistry of Materials, Vol. 16, Issue 17, p. 3267-3273
  • DOI: 10.1021/cm049310x

Neutron Powder Diffraction Study on the Crystal and Magnetic Structures of BiCoO3
journal, February 2006
  • Belik, Alexei A.; Iikubo, Satoshi; Kodama, Katsuaki
  • Chemistry of Materials, Vol. 18, Issue 3, p. 798-803
  • DOI: 10.1021/cm052334z

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