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Applied Physics Letters / Volume 97 / Issue 5 / DIELECTRICS AND FERROELECTRICITY

Appl. Phys. Lett. 97, 052902 (2010); http://dx.doi.org/10.1063/1.3475420 (3 pages)

Quantitative determination of anisotropic magnetoelectric coupling in BiFeO3–CoFe2O4 nanostructures

Yoon Seok Oh1, S. Crane2, H. Zheng2, Y. H. Chu3, R. Ramesh2, and Kee Hoon Kim1

1CeNSCMR, Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Republic of Korea
2Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA
3Department of Materials Science and Engineering, National Chiao Tung University, HsinChu 30010, Taiwan

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(Received 14 April 2010; accepted 15 July 2010; published online 4 August 2010)

The transverse and longitudinal magnetoelectric susceptibilities (MES) were quantitatively determined for (001) heteroepitaxial BiFeO3–CoFe2O4 nanostructures. Both of these MES values were sharply enhanced at magnetic fields below 6 kOe and revealed asymmetric line shapes with respect to the dc magnetic field, demonstrating the strain-induced magnetoelectric effect. The maximum transverse MES, which reached as high as ∼ 60 mV/cm Oe, was about five times larger than the longitudinal MES. This observation signifies that transverse magnetostriction of the CoFe2O4 nanopillars is enhanced more than the bulk value due to preferred magnetic domain alignment along the [001] direction coming from compressive, heteroepitaxial strain.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

bismuth compounds, cobalt compounds, magnetic anisotropy, magnetic domains, magnetoelectric effects, nanostructured materials

PACS

  • 75.85.+t

    Magnetoelectric effects, multiferroics

  • 75.75.-c

    Magnetic properties of nanostructures

  • 75.75.Fk

    Domain structures in nanoparticles

  • 75.30.Gw

    Magnetic anisotropy

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3475420

PUBLICATION DATA

ISSN

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

Publisher

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

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