期刊
APPLIED PHYSICS LETTERS
卷 94, 期 12, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3105993
关键词
dielectric losses; dielectric relaxation; lanthanum compounds; permittivity; strontium compounds
资金
- Deutsche Forschungsgemeinschaft via the Sonderforschungsbereich [484]
- Commission of the European Communities
- STREP: NUOTO [NMP3-CT-2006-032644]
The applicability of recently discovered materials with extremely high (colossal) dielectric constants, required for future electronics, suffers from the fact that their dielectric constant epsilon(') 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, La(15/8)Sr(1/8)NiO(4), surpass those of other materials. Especially, epsilon(') retains its colossal magnitude of >10 000 well into the gigahertz range.
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