Colossal dielectric constant up to GHz at room temperature

Abstract

The search for new materials with extremely high ("colossal") dielectric constants, required for future electronics, is one of the most active fields of modern materials science. However, the applicability of the colossal-epsilon' materials, discovered so far, 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 La15/8Sr1/8NiO4 surpass those of other materials. Especially, epsilon' retains its colossal magnitude of >10000 well into the GHz range. This material is prone to charge order and this spontaneous ordering process of the electronic subsystem can be assumed to play an important role in the generation of the observed unusual dielectric properties.

arXiv comment4 pages, 4 figures. Shortened version, Abstract, text, and Fig. 1 revised

References in corpus (8)

• Materials with Colossal Dielectric Constant: Do They Exist?
• Non-intrinsic origin of the Colossal Dielectric Constants in CaCu3Ti4O12
• Colossal dielectric constants in single-crystalline and ceramic CaCu3Ti4O12 investigated by broadband dielectric spectroscopy
• Broadband dielectric spectroscopy on single-crystalline and ceramic CaCu3Ti4O12
• A Novel Dielectric Anomaly in Cuprates and Nickelates: Signature of an Electronic Glassy State
• Low-Temperature Permittivity of Insulating Perovskite Manganites
• Dielectric response of the charge-ordered two-dimensional nickelate La1.5Sr0.5NiO4
• Broadband dielectric response of CaCu3Ti4O12: From dc to the electronic transition regime

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• Dielectric Spectroscopy on Organic Charge-Transfer Salts
• Charge order, dielectric response and local structure of La5/3Sr1/3NiO4 system
• Sub-Wavelength Terahertz Spin-Flip Laser Based on a Magnetic Point-Contact Array
• Dielectric signature of charge order in lanthanum nickelates
• Insulating improper ferroelectric domain walls as robust barrier layer capacitors
• Post-synthesis tuning of dielectric constant via ferroelectric domain wall engineering
• Strong spintronic magnetoelectric effect in layered magnetic metamaterial