Microwave dielectric properties of BaTiO3 and Ba0.5Sr0.5TiO3 thin films on (001) MgO

Alldredge, L. M. B.; Wontae Chang; Kirchoefer, Steven W.; Pond, Jeffrey M.
November 2009
Applied Physics Letters;11/30/2009, Vol. 95 Issue 22, p222902
Academic Journal
The microwave properties of BaTiO3 and Ba0.5Sr0.5TiO3 films were characterized as a function of in-plane film strain, crystallographic direction, film distortion, and dc bias. The strain dependence of BaTiO3 and Ba0.5Sr0.5TiO3 films showed an opposite pattern at room temperature, going from compression to tension, or vice versa. At zero bias, the dielectric constant and dielectric loss showed little dependence on direction ([100] and [110]). However, the tunability was consistently smaller along the [110] direction than along [100]. These observations agreed well with our previous work on how polarizations (both ionic and spontaneous) form and contribute to the nonlinear dielectric behavior.


Related Articles

  • Dielectric nonlinearity of Pb(Yb1/2Nb1/2)O3–PbTiO3 thin films with {100} and {111} crystallographic orientation. Gharb, N. Bassiri; Trolier-McKinstry, S. // Journal of Applied Physics;3/15/2005, Vol. 97 Issue 6, p064106 

    The extrinsic contributions to the dielectric response of 0.5Pb(Yb1/2Nb1/2)O3–0.5PbTiO3 thin films with (100) or (111) crystallographic orientation were studied (all indices are given in terms of the pseudocubic cell). Both the nonlinearity in the permittivity as well as the polarization...

  • Microwave dielectric properties of strained Ba0.5Sr0.5TiO3 films with and without strain-induced permanent polarization at room temperature. Chang, Wontae; Alldredge, L. M. B.; Kirchoefer, Steven W.; Pond, Jeffrey M. // Journal of Applied Physics;7/1/2007, Vol. 102 Issue 1, p014105 

    At room temperature, Ba0.5Sr0.5TiO3 films can be distorted into in-plane or out-of-plane tetragonal structure depending on the type of film strain while the bulk ferroelectric is in a paraelectric phase (i.e., cubic). The film distortion can be accompanied with or without strain-induced...

  • Spin polarization of currents in Co/Pt multilayer and Co–Pt alloy thin films. Rajanikanth, A.; Kasai, S.; Ohshima, N.; Hono, K. // Applied Physics Letters;7/12/2010, Vol. 97 Issue 2, p022505 

    The point contact Andreev reflection technique was employed to estimate the spin polarization of currents in Co/Pt multilayered thin film and Co–Pt alloy film with perpendicular anisotropy. The spin polarization of currents in the Co–Pt alloy film was estimated to be 0.48, while...

  • Broadband complex permittivity measurement techniques of materials with thin configuration at microwave frequencies. Murata, Ken-ichiro; Hanawa, Akio; Nozaki, Ryusuke // Journal of Applied Physics;10/15/2005, Vol. 98 Issue 8, p084107 

    A test method to evaluate the complex permittivity of materials with thin configuration (thickness of 50–300 μm) is presented. We evaluate the complex permittivity of materials with various mechanical and electrical characteristics (films, powders, and liquids) at frequencies from 100...

  • Magnetoelectric effect in thin films and layered toroidal structures. Chupis, I. E. // Low Temperature Physics;Apr2003, Vol. 29 Issue 4, p281 

    A calculation of the magnetoelectric and dielectric susceptibilities is carried out for a layered structure in which thin toroidal layers alternate with dielectric layers not found in a state of spontaneous toroidal ordering. The toroic considered is nickel iodine boracite. It is shown that an...

  • Dielectric functions (1 to 5 eV) of wurtzite Mg[sub x]Zn[sub 1-x]O (x≤0.29) thin films. Schmidt, R.; Rheinländer, B.; Schubert, M.; Spemann, D.; Butz, T.; Lenzner, J.; Kaidashev, E. M.; Lorenz, M.; Rahm, A.; Semmelhack, H. C.; Grundmann, M. // Applied Physics Letters;4/7/2003, Vol. 82 Issue 14, p2260 

    The optical dielectric functions for polarization perpendicular and parallel to the c-axis (optical axis) of pulsed-laser-deposition grown wurtzite Mg[sub x]Zn[sub 1-x]O(0 ≤ x ≤ 0.29) thin films have been determined at room temperature using ellipsometry for photon energies from 1 to...

  • Anomalous electric-field effect and glassy behaviour in granular aluminium thin films: electron glass? Grenet, T.; Delahaye, J.; Sabra, M.; Gay, F. // European Physical Journal B -- Condensed Matter;Apr2007, Vol. 56 Issue 3, p183 

    We present a study of non-equilibrium phenomena observed in the electrical conductance of insulating granular aluminium thin films. An anomalous field effect and its slow relaxation are studied in some detail. The phenomenology is very similar to the one already observed in indium oxide. The...

  • Dielectric dispersion of BiFeO3 thin film over a broad frequency range (100 Hz–10 GHz). Zhang, Xiao-Yu; Song, Qing; Xu, Feng; Ong, C. K. // Applied Physics Letters;1/12/2009, Vol. 94 Issue 2, pN.PAG 

    The dielectric properties of single-phase BiFeO3 (BFO) thin films were investigated based on parallel-plate electrode (PPE) and coplanar interdigital electrode (CIE) configurations across a wide frequency range of 100 Hz–10 GHz. The dielectric dispersion in the PPE configuration, caused...

  • Low temperature dielectric characterization of Mg-doped SrTiO3 thin films prepared by sol-gel. Okhay, Olena; Wu, Aiying; Vilarinho, Paula M.; Tkach, Alexander // Applied Physics Letters;4/12/2010, Vol. 96 Issue 15, p152906 

    Voltage dependence of dielectric constant [variant_greek_epsilon]′ of ferroelectrics and low dielectric loss tan δ of incipient ferroelectrics make them attractive for tuning elements in microwave circuits. In this letter, field dependence of the low-temperature dielectric permittivity...


Read the Article


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

Try another library?
Sign out of this library

Other Topics