Materials with Colossal Dielectric Constant: Do They Exist?

Details Materials with Colossal Dielectric Constant: Do They Exist? Materials with Colossal Dielectric Constant: Do They Exist?

2002-01-10

arxiv.org/abs/cond-mat/0201146v1

Phys. Rev. B 66, 052105 (2002)

Physics

Condensed Matter

3 figures

Scientific paper

10.1103/PhysRevB.66.052105

Experimental evidence is provided that colossal dielectric constants, epsilon >= 1000, sometimes reported to exist in a broad temperature range, can often be explained by Maxwell-Wagner type contributions of depletion layers at the interface between sample and contacts, or at grain boundaries. We demonstrate this on a variety of different materials. We speculate that the largest intrinsic dielectric constant observed so far in non-ferroelectric materials is of order 100.

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