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      CaCu3Ti4O12: One-step internal barrier layer capacitor

      Author(s): , , ,
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      Journal: Applied Physics Letters
      Publisher: AIP Publishing

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          Electroceramics: Characterization by Impedance Spectroscopy

          John T S Irvine, Derek C Sinclair, Anthony R. West (1990)
          Article 0 comments Cited 270 times – based on 0 reviews     Review now
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            High Dielectric Constant in ACu3Ti4O12 and ACu3Ti3FeO12 Phases

            M.A. Subramanian, Dong-Dong Li, N Duan … (2000)
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              Optical response of high-dielectric-constant perovskite-related oxide.

              C. Homes, T. Vogt, S. Shapiro … (2001)
              Optical conductivity measurements on the perovskite-related oxide CaCu3Ti4O12 provide a hint of the physics underlying the observed giant dielectric effect in this material. A low-frequency vibration displays anomalous behavior, implying that there is a redistribution of charge within the unit cell at low temperature. At infrared frequencies (terahertz), the value for the dielectric constant is approximately 80 at room temperature, which is far smaller than the value of approximately 10(5) obtained at lower radio frequencies (kilohertz). This discrepancy implies the presence of a strong absorption at very low frequencies due to dipole relaxation. At room temperature, the characteristic relaxation times are fast (less than or approximately 500 nanoseconds) but increase dramatically at low temperature, suggesting that the large change in dielectric constant may be due to a relaxor-like dynamical slowing down of dipolar fluctuations in nanosize domains.
              Article 0 comments Cited 183 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Title: Applied Physics Letters
                Abbreviated Title: Appl. Phys. Lett.
                Publisher: AIP Publishing
                ISSN (Print): 0003-6951
                ISSN (Electronic): 1077-3118
                Publication date Created: March 25 2002
                Publication date (Print): March 25 2002
                Volume: 80
                Issue: 12
                Pages: 2153-2155
                Article
                DOI: 10.1063/1.1463211
                SO-VID: 6d71f8de-af7c-481f-a888-5fdfbfc37312
                Copyright © © 2002
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