Crossover between extrinsic and intrinsic dielectric loss mechanisms in SrTiO[sub 3] thin films at microwave frequencies

Astafiev, K.F.; Sherman, V.O.; Tagantsev, A.K.; Setter, N.; Kaydanova, T.; Ginley, D.S.
March 2004
Applied Physics Letters;3/29/2004, Vol. 84 Issue 13, p2385
Academic Journal
The dc bias field dependence of the dielectric loss in SrTiO[sub 3] thin films deposited onto MgO substrate is investigated. The experimental data obtained at different frequencies of the ac field (8 and 16 GHz) from differently processed films (as deposited and oxygen annealed) strongly suggest the occurrence of a crossover in the dominant loss mechanism. The crossover is driven by the dc bias field: at weak fields the loss is governed by an extrinsic mechanism(s) whereas, at higher fields, the contribution of an intrinsic mechanism (dc field-induced quasi-Debye loss) becomes predominant. © 2004 American Institute of Physics.


Related Articles

  • Polycrystalline Ba0.6Sr0.4TiO3 thin films on r-plane sapphire: Effect of film thickness on strain and dielectric properties. Fardin, E. A.; Holland, A. S.; Ghorbani, K.; Akdogan, E. K.; Simon, W. K.; Safari, A.; Wang, J. Y. // Applied Physics Letters;10/30/2006, Vol. 89 Issue 18, p182907 

    Polycrystalline Ba0.6Sr0.4TiO3 (BST) films grown on r-plane sapphire exhibit strong variation of in-plane strain over the thickness range of 25–400 nm. At a critical thickness of ∼200 nm, the films are strain relieved; in thinner films, the strain is tensile, while compressive strain...

  • X-ray characterization of in-plane ordering in YBa[sub 2]Cu[sub 3]O[sub 7-x] thin films using a... Perrin, A.; Karkut, M.G. // Applied Physics Letters;1/28/1991, Vol. 58 Issue 4, p412 

    Characterizes the in-plane structure of YBa[sub 2]Cu[sub 3]O[sub 7] thin films using a standard Weissenberg camera in the oscillating mode. Parallel alignment of the in-plane film axes to substrate axes for films optimally grown on (100) MgO or (100) SrTiO[sub 3] substrates; Film orientation of...

  • AFM studies of surface morphologies of sputtered SrTiO[sub 3] films and annealed MgO substrates. Meng, Q.; Moerman, R.; Sonnenberg, A.H.; Gerritsma, G.J. // Applied Physics A: Materials Science & Processing;1999, Vol. 68 Issue 2, p239 

    Abstract. Atomic force microscopy (AFM) is applied to study the surface morphologies and growth mechanisms of sputtered SrTiO[sub 3] films on single-crystal MgO(100) substrates. Meanwhile, surface morphologies of as-polished and post-annealed MgO(100) substrates are investigated as well. Effects...

  • Epitaxial Sr2(AlTa)O6 films as buffer layers on MgO for YBa2Cu3O7-x thin film growth. Chen, K. Y.; Afonso, S.; Wang, R. C.; Tang, Y. Q.; Salamo, G.; Chan, F. T.; Guo, R.; Bhalla, A. S. // Journal of Applied Physics;8/1/1995, Vol. 78 Issue 3, p2138 

    Focuses on strontium-(aluminum-tantalum)-oxygen (O) thin films that have been deposited on magnesium-O substrates using pulsed laser deposition. Dielectric properties of the thin film ceramic samples; Application of the pulsed laser deposition technique; Overview of the in-plane epitaxy of the...

  • Crystallographic characterization of tetragonal (Pb,La)TiO3 epitaxial thin films grown by pulsed laser deposition. Kang, Young Min; Ku, Ja Kang; Baik, Sunggi // Journal of Applied Physics;8/15/1995, Vol. 78 Issue 4, p2601 

    Presents a study that evaluated the crystallographic properties of lead-lanthanum-titanium-oxygen epitaxial thin films grown by pulsed laser deposition on single-crystal substrates such as magnesium-oxygen and strontium-titanium-oxygen. Discussion on ferroelectric thin films; Use of asymmetric...

  • Strontium–titanate-doped lead metaniobate ferroelectric thin films. Xue, J. M.; Ezhilvalavan, S.; Gao, X. S.; Wang, J. // Applied Physics Letters;7/29/2002, Vol. 81 Issue 5, p877 

    Ferroelectric polymorph of lead metaniobate (PbNb[sub 2]O[sub 6]) exhibits an orthorhombic structure, which is metastable at room temperature and can only be obtainable by quenching from high temperatures (∼1200 °C). In this letter, we report a ferroelectric PbNb[sub 2]O[sub 6] thin film...

  • Effects of thickness on the infrared optical properties of Ba[sub 0.9]Sr[sub 0.1]TiO[sub 3] ferroelectric thin films. Hu, Z.; Wang, G.; Huang, Z.; Meng, X.; Zhao, Q.; Chu, J. // Applied Physics A: Materials Science & Processing;2004, Vol. 78 Issue 5, p757 

    Using infrared spectroscopic ellipsometry (IRSE), the optical properties of the Ba[sub 0.9]Sr[sub 0.1]TiO[sub 3] (BST) ferroelectric thin films with different film thicknesses on Pt/Ti/SiO[sub 2]/Si substrates prepared by a modified sol-gel method have been investigated in the 2.5–12.6...

  • Evidence for two-phase regions in Ba[sub 0.5]Sr[sub 0.5]TiO[sub 3] thin films from capacitance–voltage data. Jiang, A.Q.; Scott, J.F.; Sinnamon, L.J.; Gregg, J.M. // Applied Physics Letters;10/20/2003, Vol. 83 Issue 16, p3359 

    The Curie–Weiss plots of reciprocal dielectric constant versus temperature, in Ba[sub 0.5]Sr[sub 0.5]TiO[sub 3] films grown onto SrRuO[sub 3] lower electrodes by pulsed-laser deposition, show two minima below film thicknesses of 280 nm. This double minima implies possible mixed phases in...

  • Titanium-oxide films made by rf diode sputtering from a compound target. Yang, Ming M. // Journal of Applied Physics;8/1/1987, Vol. 62 Issue 3, p1035 

    Describes the thin-film stress, stochiometric ratio, deposition rate, and refractive index of a radio frequency-sputtered titanium-oxide dielectric film. Applications of titanium dioxide; Overview of central composite rotatable design experiment conditions; Distance versus differential...


Read the Article


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

Try another library?
Sign out of this library

Other Topics