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A novel route to lower the dielectric loss in CaCu$_{3}$Ti$_{4}$O$_{12}$ ceramics

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arxiv cond-mat/0511683 v1 pith:HBGKXSHE submitted 2005-11-29 cond-mat.mtrl-sci

classification cond-mat.mtrl-sci
keywords cctocacuceramicsdielectriclossanalysisconductivitydecrease
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abstract

Based upon a widely-accepted internal-barrier-layer-capacitance (IBLC) model, the dielectric loss in the giant-dielectric-constant CaCu$_{3}$Ti$_{4}$O$_{12}$ (CCTO) material is expected to decrease as the conductivity of the CCTO grains/subgrains increases. In this letter, we report that this idea was successfully realized through the La-for-Ca substitution in the CCTO ceramics. The impedance spectroscopy analysis gives the evidence.

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