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Title: Heterointerface design and strain tuning in epitaxial BiFeO3:CoFe2O4 nanocomposite films

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4936157· OSTI ID:1498031
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  1. Texas A & M Univ., College Station, TX (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Center for Integrated Nanotechnologies (CINT)
  3. Univ. of Cambridge (United Kingdom)

The ability to control the morphology of heterointerfaces with coupled functionalities is fascinating from both fundamental and technological perspectives. Here, using BiFeO3:CoFe2O4 vertically aligned nanocomposite (VAN) films as a model system, we demonstrate a simple and effective method to modulate the heterointerface and its morphology in nanocomposite films with pulsed laser deposition. By tuning the deposition frequency through thickness during film growth, both vertically straight and gradient heterointerfaces have been achieved. The modulated heterointerface is strongly correlated with strain tuning and interface coupling, and thus modifies the magnetic anisotropy, coercive fields, and ferroelectric switching behavior. Furthermore, this study provides a viable approach for tailoring the interface strain and coupling in VAN and achieving tunable physical properties.

Research Organization:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
National Science Foundation (NSF); USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; European Research Council (ERC)
Grant/Contract Number:
89233218CNA000001; DMR-1401266; DMR-0846504; ERC-2009-AdG 247276 NOVOX
OSTI ID:
1498031
Report Number(s):
LA-UR-15-29155
Journal Information:
Applied Physics Letters, Vol. 107, Issue 21; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

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Cited By (7)

Metal Oxide Nanocomposites: A Perspective from Strain, Defect, and Interface journal October 2018
Structure, Ferroelectricity, and Magnetism in Self‐Assembled BiFeO 3 –CoFe 2 O 4 Nanocomposites on (110)‐LaAlO 3 Substrates journal May 2019
Effect of interface coupling on magnetoelectric response of Pb(Zr0.52Ti0.48)O3/La0.67Sr0.33MnO3 thin film under different strain states journal September 2018
Self-assembling epitaxial growth of a single crystalline CoFe 2 O 4 nanopillar array via dual-target pulsed laser deposition journal January 2018
Transition of the exchange bias effect from in-plane to out-of-plane in La 0.7 Sr 0.3 MnO 3 :NiO nanocomposite thin films journal January 2019
Dielectric tunability of vertically aligned ferroelectric-metal oxide nanocomposite films controlled by out-of-plane misfit strain journal April 2016
Multiferroic vertically aligned nanocomposite with CoFe 2 O 4 nanocones embedded in layered Bi 2 WO 6 matrix journal June 2019