TITLE

Order-disorder nature of ferroelectric BaTi2O5

AUTHOR(S)
Hushur, Anwar; Shigematsu, Hirotake; Akishige, Yukikuni; Kojima, Seiji
PUB. DATE
March 2005
SOURCE
Applied Physics Letters;3/14/2005, Vol. 86 Issue 11, p112903
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Ferroelectric single crystals of BaTi2O5 have been studied in detail by Raman and high-resolution micro-Brillouin scattering with a focus on the central component of the relaxation mode over a wide temperature range (20–600 °C). A relaxation mode has been clearly observed in these single crystals. The temperature dependences of the relaxation time and integrated intensity of the relaxation mode are well reproduced by the extended semiclassical tunneling model. The ferroelectric phase transition shows, at least near the vicinity of Tc, an order-disorder nature. Our results indicate that the spontaneous polarization mainly resulted from the dynamic disorder of the Ti ions in the octahedra along the polar b axis of BaTi2O5.
ACCESSION #
16581649

 

Related Articles

  • Ion-driven deuterium retention in tungsten. Ogorodnikova, O. V.; Roth, J.; Mayer, M. // Journal of Applied Physics;Feb2008, Vol. 103 Issue 3, p034902 

    The ion-driven retention of deuterium in polycrystalline tungsten (PCW) is studied experimentally and theoretically as a function of temperature, incident ion energy, and ion fluence. Deuterium retention was investigated by thermodesorption spectroscopy and ion beam analysis. The peculiarities...

  • Size and stability of liposomes: A possible role of hydration and osmotic forces. Sabín, J.; Prieto, G.; Ruso, J. M.; Hidalgo-Álvarez, R.; Sarmiento, F. // European Physical Journal E -- Soft Matter;Aug2006, Vol. 20 Issue 4, p401 

    Dynamic light scattering and electrophoretic mobility measurements have been used to characterize the size, size distribution and zeta potentials (ζ-potentials) of egg yolk phosphatidylcholine (EYPC) liposomes in the presence of monovalent ions ( Na+ and K+). To study the stability of...

  • Dynamics of layered Jahn–Teller crystals of rare-earth compounds (Review). Kut'ko, V. I. // Low Temperature Physics;Jan2005, Vol. 31 Issue 1, p1 

    Spectroscopic data on crystals of rare-earth compounds having structural instability due to the cooperative Jahn–Teller effect are reviewed. Based on an analysis of these data, it is inferred that the dynamic coupling of low-frequency electronic excitations of the rare-earth ions with...

  • High cluster formation tendency in Co implanted ZnO. Potzger, K.; Kuepper, K.; Xu, Q.; Zhou, S.; Schmidt, H.; Helm, M.; Fassbender, J. // Journal of Applied Physics;Jul2008, Vol. 104 Issue 2, p023510 

    ZnO(0001) single crystals have been implant doped with a maximum of 5 at. % of Co at low temperatures. While as-implanted crystals do not show ferromagnetic properties, postimplantation annealing leads to the transformation of the implanted Co ions into small metallic clusters giving rise to a...

  • Crystal field effects in rare-earth ferroborates RFe3(BO3)4 with R = Nd, Tb, Dy, or Er. Volkov, D. V.; Demidov, A. A.; Kolmakova, N. P.; Takunov, L. V. // Physics of the Solid State;Sep2008, Vol. 50 Issue 9, p1677 

    Crystal field effects in rare-earth ferroborates RFe3(BO3)4 with various rare-earth elements are studied theoretically. The rare-earth magnetoelastic interaction Hamiltonian is written in a multipole approximation. The field and temperature dependences of the multipole moments and strain...

  • Intensity of the f-f transitions of Nd3+, Er3+, and Tm3+ rare-earth ions in calcium niobium gallium garnet crystals. Belova, I. A.; Bol'shchikov, F. A.; Voron'ko, Yu. K.; Malov, A. V.; Popov, A. V.; Ryabochkina, P. A.; Sobol', A. A.; Ushakov, S. N. // Physics of the Solid State;Sep2008, Vol. 50 Issue 9, p1611 

    This paper reports on the results of the investigation into the intensities of the f-f transitions of Nd3+, Er3+, and Tm3+ ions in calcium niobium gallium garnet (CNGG) crystals. The values of the oscillator strengths and line strengths obtained for hypersensitive transitions and the intensity...

  • Static and dynamic light scattering from liquid crystalline solutions of rodlike macromolecules. van der Schoot, Paul; Odijk, Theo // Journal of Chemical Physics;9/1/1990, Vol. 93 Issue 5, p3580 

    It is argued that concentration fluctuations in lyotropic nematics can cause significant scattering of light. We calculate the static structure factor numerically for a nematic suspension of rods in the second virial approximation. An analytical approximation is also given based on a variational...

  • Cation distribution in the crystal structure of Li2.32Fe[PO4]F—A synthetic structural analog of grandidierite. Yakubovich, O. V.; Massa, W.; Kireev, V. V.; Urusov, V. S. // Doklady Physics;Sep2006, Vol. 51 Issue 9, p474 

    The article presents a study related to a new high-lithium compound in which Li+ ions variously populate five independent structural positions. The aim of the study is to provide data on the synthesis, X-ray structure, and crystal chemistry of the lithium compound. The crystallographic...

  • Effect of hydrogen on the stability of isovalently doped ZnSe crystals. Gal'chinetskii, L. P.; Grinev, B. V.; Starzhinskii, N. G.; Dulfan, A. Ya.; Ryzhikov, V. D. // Inorganic Materials;Oct2008, Vol. 44 Issue 10, p1052 

    We present thermodynamic analysis of the relative stability of V ZnZniXSe defect complexes (radioluminescence centers in ZnSe(XSe) crystals) toward reactions with hydrogen in the temperature range 300 to 1300 K and analysis of reactions between the surface of ZnSe(XSe) crystals and air that lead...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

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

Try another library?
Sign out of this library

Other Topics