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

Journal Article · Sat Jan 01 04:00:00 EST 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3671392· OSTI ID:1055129

Vasudevan, Rama K ^[1]; Bogle, K A ^[2]; Kumar, Amit ^[1]; Jesse, Stephen ^[1]; Magaraggia, R ^[3]; Stamps, R ^[3]; Ogale, S ^[4]; Potdar, H S ^[4]

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1. ORNL
2. University of New South Wales, Sydney, Australia
3. University of Glasgow
4. National Chemical Laboratory, India

Ferroelectric BiFeO3 (BFO) nanoparticles deposited on epitaxial substrates of SrRuO3 (SRO) and La1xSrxMnO3 (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.

• Research Organization: Oak Ridge National Laboratory (ORNL); Center for Nanophase Materials Sciences
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1055129
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 25 Vol. 99; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

Ferroelectric
Multiferroic
nanoparticle