TITLE

Nonlinear positive temperature coefficient of resistance of BaTiO[sub 3] film

AUTHOR(S)
Okano, Motochika; Watanabe, Yukio; Cheong, Sang-Wook
PUB. DATE
March 2003
SOURCE
Applied Physics Letters;3/24/2003, Vol. 82 Issue 12, p1923
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Conductance decreasing with increasing temperature (T) above a characteristic T (T[sub 0]) is found in the reverse-diode characteristics of metal contacts on strained BaTiO[sub 3] epitaxial films. The conduction mechanisms below and above TO near the Curie temperature of the bulk BaTiO[sub 3] are distinctly different. Marked similarities to these characteristics are found in the surface conduction on BaTiO[sub 3] single crystal in a high vacuum. By comparing the observations with the positive temperature coefficient of resistance (PTCR) effect in ceramics, we suggest that the anomaly is regarded as a PTCR effect at metal/ferroelectric contact, and discuss the origin of the effect in thin films and single crystals.
ACCESSION #
9319874

 

Related Articles

  • High-speed (10[sup 4]...C/s) scanning microcalorimetry with monolayer sensitivity (J/m[sup 2]). Lai, S.L.; Ramanath, G. // Applied Physics Letters;8/28/1995, Vol. 67 Issue 9, p1229 

    Describes a high sensitivity scanning microcalorimetry for the measurement of thermodynamic properties related to interfaces and thin film reactions. Use of standard thin film membrane processing technology; Potential for measuring irreversible heat of reaction for processes at interfaces;...

  • Temperature dependence of the reversal mechanism in spin-valve films. Portier, X.; Petford-Long, A.K.; Anthony, T.C.; Brug, J.A. // Applied Physics Letters;8/30/1999, Vol. 75 Issue 9, p1290 

    Investigates the thermal behavior of spin valves (SV) and exchange-coupled films by in situ experiments in a Lorentz microscope. Performance of in situ magnetizing combined with in situ heating experiments; Magnetization reversal of SV materials; Switching of the pinned layer near the blocking...

  • Ferroelectric thin films grown on tensile substrates: Renormalization of the Curie--Weiss law and... Pertsev, N. A.; Zembilgotov, A. G. // Journal of Applied Physics;2/1/1999, Vol. 85 Issue 3, p1698 

    Presents information on a study which calculated the dielectric properties of epitaxial thin films grown on cubic substrates using a thermodynamic theory. Thermodynamic theory; Comparison between theory and experiment; Conclusions.

  • Reactive codeposition of in situ Y-Ba-Cu-O superconducting films using dilute mixtures of ozone in oxygen. Kubinski, D. J.; Hoffman, D. W.; Soltis, R. E.; Logothetis, E. M. // Journal of Applied Physics;2/15/1992, Vol. 71 Issue 4, p1860 

    Focuses on a study which investigated the effect of dilute additions of ozone in molecular oxygen on the limiting reactive gas pressures required for in situ deposition of yttrium-barium-copper-oxygen thin films. Materials and methods; Results of thermodynamic analysis; Function of molecular...

  • Crystallization and growth of Ni-Si alloy thin films on inert and on silicon substrates. Grimberg, I.; Weiss, B. Z. // Journal of Applied Physics;4/15/1995, Vol. 77 Issue 8, p3791 

    Provides information on a study that investigated the crystallization kinetics and thermal stability of NiSi[sub2±0.2] alloy thin films. Methodology of the study; Results and discussion on the study; Conclusions.

  • Thermal stability of α-titanium in contact with titanium nitride. Wang, Shi-Qing; Allen, Leslie H. // Journal of Applied Physics;3/1/1996, Vol. 79 Issue 5, p2446 

    Presents information on a study that examined the thermal stability of an α-titanium film in contact with a δ-TiN film in the structure of a TiN/Ti/TiN film stack on SiO[sub2] substrates by in situ sheet resistance measurement. Methodology of the study; Results and discussion on the...

  • Thermodynamics of the Mg-B system: Implications for the deposition of MgB[sub 2] thin films. Liu, Zi-Kui; Schlom, D. G.; Li, Qi; Xi, X. X. // Applied Physics Letters;6/4/2001, Vol. 78 Issue 23, p3678 

    We have studied the thermodynamics of the Mg-B system with the calculation of phase diagrams modeling technique using a computerized optimization procedure. Temperature-composition, pressure-composition, and pressure-temperature phase diagrams under different conditions are obtained. The results...

  • Thermodynamic analysis of hole trapping in SiO2 films on silicon. Boureau, G.; Carniato, S.; Capron, N.; Garapon, J.; Poumellec, B. // Journal of Applied Physics;1/1/2001, Vol. 89 Issue 1, p165 

    A thermodynamic approach based on the existence of a local equilibrium is used to evaluate the temperature dependence of the number of defects responsible for hole trapping (oxygen vacancies transformed into E′ centers) near the Si-SiO[sub 2] interface. This approach eliminates the...

  • Thermodynamics of a vortex system in a thin superconducting film with radiation defects. Artemov, A. N. // Journal of Experimental & Theoretical Physics;Sep99, Vol. 89 Issue 3, p577 

    The effect of radiation defects on the thermodynamics of a system of Pearl vortices in a thin superconducting film is examined. The scenario for a Kosterlitz-Thouless transition in this system is shown to depend on the defect concentration n[sub d]. At low concentrations, the transition takes...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics