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Title: New strain states and radical property tuning of metal oxides using a nanocomposite thin film approach

Auxetic-like strain states were generated in self-assembled nanocomposite thin films of (Ba0.6Sr0.4TiO3)1–x – (Sm2O3)x(BSTO – SmO). A switch from auxetic-like to elastic-like strain behavior was observed for x > 0.50, when the SmO switched from being nanopillars in the BSTO matrix to being the matrix with BSTO nanopillars embedded in it. A simple model was adopted to explain how in-plane strain varies with x. At high x (0.75), strongly enhanced ferroelectric properties were obtained compared to pure BSTO films. Furthermore, the nanocomposite method represents a powerful new way to tune the properties of a wide range of strongly correlated metal oxides whose properties are very sensitive to strain.
Authors:
 [1] ;  [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [3] ;  [1]
  1. Univ. of Cambridge, Cambridge (United Kingdom)
  2. Texas A & M Univ., College Station, TX (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Report Number(s):
LA-UR-15-25931
Journal ID: ISSN 2166-532X; AMPADS
Grant/Contract Number:
AC52-06NA25936; DMR0846504; DMR1401266; ERC-2009-AdG-247276-NOVOX; AC52-06NA25396
Type:
Published Article
Journal Name:
APL Materials
Additional Journal Information:
Journal Volume: 3; Journal Issue: 6; Journal ID: ISSN 2166-532X
Publisher:
American Institute of Physics (AIP)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; thin films; nanocomposites; lattice constants; ferroelectric thin films; epitaxy; dielectric thin films
OSTI Identifier:
1179645
Alternate Identifier(s):
OSTI ID: 1208851; OSTI ID: 1234659