Non-intrinsic origin of the Colossal Dielectric Constants in CaCu3Ti4O12

Abstract

The dielectric properties of CaCu3Ti4O12, a material showing colossal values of the dielectric constant, were investigated in a broad temperature and frequency range extending up to 1.3 GHz. A detailed equivalent circuit analysis of the results and two crucial experiments, employing different types of contacts and varying sample thickness, provide clear evidence that the apparently high values of the dielectric constant in CaCu3Ti4O12 are non-intrinsic and due to electrode polarization effects. The intrinsic properties of CaCu3Ti4O12 are characterized by charge transport via hopping of localized charge carriers and a relatively high dielectric constant of the order of 100.

4 pages, 4 figures

References in corpus (10)

• Materials with Colossal Dielectric Constant: Do They Exist?
• A first-principles study of the structure and lattice dielectric response of CaCu{3}Ti{4}O{12}
• Extrinsic models for the dielectric response of CaCu{3}Ti{4}O{12}
• The response of disordered matter to electromagnetic fields
• Charge transfer in the high dielectric constant materials CaCu3Ti4O12 and CdCu3Ti4O12
• Epitaxial Thin Films of the Giant-Dielectric-Constant Material CaCu_3Ti_4O_{12} Grown by Pulsed-laser Deposition
• Lattice dielectric response of CdCu{3}Ti{4}O{12} and of CaCu{3}Ti{4}O{12} from first principles
• Effects of post-anneal conditions on the dielectric properties of CaCu3Ti4O12 thin films prepared on Pt/Ti/SiO2/Si substrates
• Antiferromagnetism in CaCu${}_3$Ti${}_4$O${}_{12}$ studied by magnetic Raman spectroscopy
• Determination of the parameters of semiconducting CdF2:In with Schottky barriers from radio-frequency measurements

Cited by in corpus (47)

• Colossal dielectric constants in transition-metal oxides
• Dielectric properties of Poly(vinylidene fluoride) / CaCu3Ti4O12 composites
• Colossal dielectric constants in single-crystalline and ceramic CaCu3Ti4O12 investigated by broadband dielectric spectroscopy
• Colossal dielectric constant up to GHz at room temperature
• Electrode Polarization Effects in Broadband Dielectric Spectroscopy
• Colossal magnetocapacitance and colossal magnetoresistance in HgCr2S4
• Dielectric properties of Poly(vinylidene fluoride)/ CaCu3Ti4O12 nanocrystal composite thick films
• Broadband dielectric spectroscopy on single-crystalline and ceramic CaCu3Ti4O12
• Origin of Colossal Dielectric Response of Pr(0.6)Ca(0.4)MnO(3)
• Particle size dependence of magnetization and phase transition near T_N in multiferroic BiFeO3
• Correlations of structural, magnetic, and dielectric properties of undoped and doped CaCu3Ti4O12
• Dielectric response of the charge-ordered two-dimensional nickelate La1.5Sr0.5NiO4
• Colossal dielectric constants: A common phenomenon in CaCu3Ti4O12 related materials
• Nanoparticles of the giant dielectric material, CaCu3Ti4O12 from a precursor route
• Relaxation dynamics and colossal magnetocapacitive effect in CdCr2S4
• Absence of polar order in LuFe2O4
• Broadband dielectric response of CaCu3Ti4O12: From dc to the electronic transition regime
• Magnetic field-dependent dielectric constant in La2/3Ca1/3MnO3
• Apparent giant dielectric constants, dielectric relaxation, and ac-conductivity of hexagonal perovskites La1.2Sr2.7BO7.33 (B = Ru, Ir)
• Dielectric Spectroscopy on Organic Charge-Transfer Salts
• Conductivity contrast and tunneling charge transport in the vortex-like ferroelectric domain patterns of multiferroic hexagonal YMnO3
• Effect of calcium stoichiometry on the dielectric response of CaCu3Ti4O12 Ceramics
• Temperature dependent conductivity mechanisms observed in Pr2NiTiO6
• Super Dielectric Materials
• On the magnetism of Ln{2/3}Cu{3}Ti{4}O{12} (Ln = lanthanide)
• Magnetoelectric Effect driven by Magnetic Domain Modification in LuFe2O4
• Charge-Density-Wave like Behavior in the One-Dimensional Charge-Ordered Semiconductor (NbSe4)3I
• Charge order, dielectric response and local structure of La5/3Sr1/3NiO4 system
• Multiferroic behavior in CdCr2X4 (X = S, Se)
• Intermediate-valence behavior of the transition-metal oxide CaCu${}_3$Ru${}_4$O${}_{12}$
• Colossal magnetocapacitive effect in differently synthesized and doped CdCr2S4
• Interfacial contribution to the dielectric response in semiconducting LaBiMn4/3Co2/3O6
• Different dielectric, magnetic, and magnetodielectric mechanisms in M-type BaFe12O19 hexaferrite regulated by doping Ga3+ and In3+ cations
• Intragrain electrical inhomogenities and compositional variation of static dielectric constant in LaMn_{1-x}Fe_xO_3
• Dielectric signature of charge order in lanthanum nickelates
• Discovery of Strange Kinetics in Bulk Material: Correlated Dipoles in CaCu3Ti4O12
• Effect of (Cu/Fe)O5 bipyramid size and separation on magnetic and dielectric properties of rare earth layered perovskite LaBaCuFeO5 and LuBaCuFeO5
• Enhancement of high dielectric constant in CaCu${}_3$Ti${}_4$O${}_1$${}_2$/RuO${}_2$ composites in the vicinity of the percolation threshold
• Evidence for a Ru${}^{4+}$ Kondo Lattice in LaCu${}_3$Ru${}_4$O${}_{12}$
• Fractional Power-Law Spectral Response of CaCu3Ti4O12 Dielectric: Many-Body Effects
• Hopping mechanisms, photoluminescence studies toward highly efficient UV-responsive Pr2MgTiO6 photocatalyst
• On the complexity of spinels: Magnetic, electronic, and polar ground states
• Post-synthesis tuning of dielectric constant via ferroelectric domain wall engineering
• A Low-Temperature Specific Heat Study of the Giant Dielectric Constant Materials
• Dynamic conductivity of semiconducting manganites approaching the metal-insulator transition
• Stabilization of A-site ordered perovskites and formation of spin-half antiferromagnetic lattice: CaCu${}_3$Ti${}_4$O${}_{12}$ and CaCu${}_3$Zr${}_4$O${}_{12}$
• Superdielectric Materials Composed of Sodium Chloride, Water and Porous Alumina