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Applied Physics Letters / Volume 99 / Issue 25 / DIELECTRICS AND FERROELECTRICITY

Appl. Phys. Lett. 99, 252905 (2011); http://dx.doi.org/10.1063/1.3671392 (4 pages)

Ferroelectric and electrical characterization of multiferroic BiFeO3 at the single nanoparticle level

R. K. Vasudevan1, K. A. Bogle1, A. Kumar2, S. Jesse2, R. Magaraggia3,4, R. Stamps3,4, S. B. Ogale5, H. S. Potdar5, and V. Nagarajan1

1School of Materials Science and Engineering, University of New South Wales, Kensington, Sydney 2052, Australia
2The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
3School of Physics, The University of Western Australia, Crawley 6009, Western Australia, Australia
4SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, G12 4QQ, United Kingdom
5National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411 008, India

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(Received 20 June 2011; accepted 30 November 2011; published online 22 December 2011)

Ferroelectric BiFeO3 (BFO) nanoparticles deposited on epitaxial substrates of SrRuO3 (SRO) and La1−xSrxMnO3 (LSMO) were studied using band excitation piezoresponse spectroscopy (BEPS), piezoresponse force microscopy (PFM), and ferromagnetic resonance (FMR). BEPS confirms that the nanoparticles are ferroelectric in nature. Switching behavior of nanoparticle clusters were studied and showed evidence for inhomogeneous switching. The dimensionality of domains within nanoparticles was found to be fractal in nature, with a dimensionality constant of ∼1.4, on par with ferroelectric BFO thin-films under 100 nm in thickness. Ferromagnetic resonance studies indicate BFO nanoparticles only weakly affect the magnetic response of LSMO.

© 2011 American Institute of Physics

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KEYWORDS and PACS

Keywords

bismuth compounds, ferroelectric materials, ferroelectric thin films, ferromagnetic resonance, lanthanum compounds, multiferroics, nanoparticles, strontium compounds

PACS

  • 77.55.F-

    High-permittivity capacitive films

  • 73.22.-f

    Electronic structure of nanoscale materials and related systems

  • 76.50.+g

    Ferromagnetic, antiferromagnetic, and ferrimagnetic resonances; spin-wave resonance

  • 77.80.-e

    Ferroelectricity and antiferroelectricity

  • 77.84.-s

    Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials

  • 77.55.Nv

    Multiferroic/magnetoelectric films

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3671392

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
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