This review aims to summarize more than 100 years of research on spinel compounds,
mainly focusing on the progress in understanding their magnetic, electronic, and polar …

Ever since the beginning of this century, many kinds of materials have been reported to
demonstrate colossal permittivity (CP) or a colossal dielectric constant exceeding 103 …

A review of the basic ideas and techniques of the spectral density-functional theory is
presented. This method is currently used for electronic structure calculations of strongly …

The development of low-temperature solid oxide fuel cells (LT-SOFCs) is of significant
importance for realizing the widespread application of SOFCs. This has stimulated a …

Experimental evidence is provided that colossal dielectric constants ɛ′>~ 1 0 0 0,
sometimes reported to exist in a broad temperature range, can often be explained by …

The discovery of a giant dielectric constant,, of 105 in CaCu3Ti4O12 has increased interest
in this perovskite-type oxide. Here we demonstrate that, in addition to high permittivity …

The dielectric properties of Ca Cu 3 Ti 4 O 12, a material showing colossal values of the
dielectric constant, were investigated over a broad temperature and frequency range …

Many transition-metal oxides show very large (“colossal”) magnitudes of the dielectric
constant and thus have immense potential for applications in modern microelectronics and …

Transport and dielectric measurements have been performed in Ca Cu 3 Ti 4 O 12 ceramics.
The bulk ac conductivity shows a power-law behavior at different temperatures, which is …

AFe 1/2 B 1/2 O 3 (A= Ba, Sr, Ca; B= Nb, Ta, Sb) ceramics were synthesized and
temperature dependences of dielectric permittivity were measured at different frequencies …