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论文类型：期刊论文

发表时间：2010-05-31

发表刊物：APPLIED PHYSICS LETTERS

收录刊物：SCIE、EI

卷号：96

期号：22

ISSN号：0003-6951

摘要：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. (C) 2010 American Institute of Physics. [doi:10.1063/1.3446868]