Colossal dielectric constants in single-crystalline and ceramic CaCu3Ti4O12 investigated by broadband dielectric spectroscopy
S Krohns, P Lunkenheimer, SG Ebbinghaus… - Journal of Applied …, 2008 - pubs.aip.org
In the present work, the authors report results of broadband dielectric spectroscopy on
various samples of CaCu 3 Ti 4 O 12 (CCTO), also including single-crystalline material,
which so far was only rarely investigated. The measurements extend up to 1.3 GHz, covering
more than nine frequency decades. We address the question of the origin of the colossal
dielectric constants and of the relaxational behavior in this material, including the second
relaxation reported in several recent works. For this purpose, the dependence of the …
various samples of CaCu 3 Ti 4 O 12 (CCTO), also including single-crystalline material,
which so far was only rarely investigated. The measurements extend up to 1.3 GHz, covering
more than nine frequency decades. We address the question of the origin of the colossal
dielectric constants and of the relaxational behavior in this material, including the second
relaxation reported in several recent works. For this purpose, the dependence of the …
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