S. Krohns, P. Lunkenheimer, Ch. Kant, A.V. Pronin, H.B. Brom, A.A. Nugroho, M. Diantoro, A. Loidl
The applicability of recently discovered materials with extremely high ("colossal") dielectric constants, required for future electronics, suffers from the fact that their dielectric constant ε′ only is huge in a limited frequency range below about 1 MHz. In the present report, we show that the dielectric properties of a charge-ordered nickelate, La15/8 Sr1/8 NiO4, surpass those of other materials. Especially, ε′ retains its colossal magnitude of >10 000 well into the gigahertz range. © 2009 American Institute of Physics.
Experimental Physics v, Center for Electronic Correlations and Magnetism, University of Augsburg, 86159 Augsburg, Germany; Forschungszentrum Dresden-Rossendorf (FZD), RAS Hochfeld-Magnetlabor Dresden (HLD), 01314 Dresden, Germany; A. M. Prokhorov Institute of General Physics, 119991 Moscow, Russian Federation; Kamerlingh Onnes Laboratory, Leiden University, 2300 RA Leiden, P.O. Box 9504, Netherlands; Department of Physics, Bandung Institute of Technology, Bandung 40132, Jl. Ganesha 10, Indonesia; Department of Physics, State University of Malang, Malang 65145, Jl. Surabaya 6, Indonesia
