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Applied Physics Letters / Volume 96 / Issue 22 / NANOSCALE SCIENCE AND DESIGN

Appl. Phys. Lett. 96, 223111 (2010); http://dx.doi.org/10.1063/1.3446868 (3 pages)

Multidielectric polarizations in the core/shell Co/graphite nanoparticles

X. F. Zhang1, P. F. Guan2, and X. L. Dong1

1School of Materials Science and Engineering, Dalian University of Technology, Dalian, Liaoning 116024, People’s Republic of China
2World Premier International Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan

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(Received 16 April 2010; accepted 12 May 2010; published online 3 June 2010)

Hybrid core/shell Co/graphite nanoparticles synthesized by an arc-discharge method exhibit an enhanced dielectric loss property in the frequency range of 2–18 GHz. Complex permittivity expressed by Debye dipolar polarization approximate show that three kinds of dielectric polarizations coexist in this hybrid system. Combined with theoretical simulation, we further clarified that the dielectric polarizations are ascribed to the high defective graphite shells, and additional interfacial polarizations arising from the special core/shell architecture.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

arcs (electric), cobalt, dielectric losses, dielectric polarisation, graphite, nanoparticles

PACS

  • 77.22.Ej

    Polarization and depolarization

  • 82.33.Xj

    Plasma reactions (including flowing afterglow and electric discharges)

  • 77.22.Gm

    Dielectric loss and relaxation

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3446868

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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