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Applied Physics Letters / Volume 97 / Issue 9 / MAGNETISM AND SUPERCONDUCTIVITY

Appl. Phys. Lett. 97, 092501 (2010); http://dx.doi.org/10.1063/1.3485669 (3 pages)

Multiferroicity and magnetoelectric coupling in half-doped manganite La0.5Ca0.5MnO3

Tao Zou1, Fen Wang1, Yi Liu2, Li-Qin Yan1, and Young Sun1

1Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
2Department of Physics, University of Science and Technology of China, Hefei 230026, Anhui, People’s Republic of China

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(Received 31 May 2010; accepted 12 August 2010; published online 31 August 2010)

We present experimental evidences to verify the peculiar multiferroics predicted in the half-doped manganite La0.5Ca0.5MnO3. The dielectric constant exhibits a frequency-independent peak just at the antiferromagnetic charge ordering transition temperature TCO, indicating a close correlation between the ferroelectriclike transition and charge ordering. In addition to a large magnetodielectric effect, the dynamic magnetoelectric coupling measurements provide solid evidences to an enhanced magnetoelectric coupling below TCO. Moreover, the magnetic field dependence of the coupling coefficient shows a close correlation with the magnetization hysteresis loop, which reveals that a large magnetoelectric coupling only persists in the charge ordering state.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

antiferromagnetic materials, calcium compounds, lanthanum compounds, magnetic hysteresis, magnetoelectric effects, multiferroics, permittivity

PACS

  • 75.85.+t

    Magnetoelectric effects, multiferroics

  • 77.80.-e

    Ferroelectricity and antiferroelectricity

  • 75.50.Ee

    Antiferromagnetics

  • 77.22.Ch

    Permittivity (dielectric function)

  • 75.60.Ej

    Magnetization curves, hysteresis, Barkhausen and related effects

  • 77.84.Bw

    Elements, oxides, nitrides, borides, carbides, chalcogenides, etc.

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3485669

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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