TITLE

Far-infrared and dielectric spectroscopy of relaxor ferroelectric (Pb1-xLax)(Zr0.4Ti0.6)O3

AUTHOR(S)
Buixaderas, E.; Nuzhnyy, D.; Veljko, S.; Kamba, S.; Savinov, M.; Petzelt, J.; Kosec, M.
PUB. DATE
April 2007
SOURCE
Journal of Applied Physics;4/1/2007, Vol. 101 Issue 7, p074106
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The dielectric behavior of tetragonal (Pb1-xLax)(Zr0.4Ti0.6)O3 (PLZT x/40/60) ceramics doped with lanthanum (x=12% and 15%) has been investigated from 102 to 1014 Hz in the temperature range of 20–800 K. Relaxor ferroelectric behavior, together with a first-order ferroelectric phase transition at TC below the dielectric maximum, was revealed. The lowest-frequency phonon partially softens to TC and splits into two components in the ferroelectric phase. It is shown that similar splitting is typical for all relaxors even for samples without ferroelectric phase transitions, because the TO1 splitting occurs due to a local distortion in the polar clusters. A relaxational mode, assigned to the dynamics of polar clusters, was revealed in the teraherz spectra below 800 K. This mode slows down to the microwave range on cooling and finally anomalously broadens below TC, which appears to be characteristic for all relaxors. In comparison to the rhombohedral (Pb1-xLa0.095)(Zr0.65Ti0.35)O3, the low-temperature permittivity and dielectric losses are lower in the tetragonal PLZT as expected from the presence of the ferroelectric phase transition.
ACCESSION #
24721717

 

Related Articles

  • Investigation of the mobility in poly(vinylidene fluoride) ferroelectric films with different structures. Kochervinskii, V. V.; Malyshkina, I. A.; Vorob'ev, D. V.; Bessonova, N. P. // Physics of the Solid State;Sep2010, Vol. 52 Issue 9, p1976 

    The molecular mobility in two isotropic poly(vinylidene fluoride) samples crystallized in the α phase from the melt with different crystallinities and lattice perfections has been investigated by broadband dielectric spectroscopy. It has been revealed that the local-mobility parameters are...

  • Dielectric spectroscopy of Polymer Stabilised Ferroelectric Liquid Crystals. Kaur, S.; Dierking, I.; Gleeson, H. F. // European Physical Journal E -- Soft Matter;Nov2009, Vol. 30 Issue 3, p265 

    Dielectric measurements were carried out in the frequency range from 20Hz to 500kHz on Polymer Stabilised Ferroelectric Liquid Crystals (PSFLCs). Polymerisation in the Smectic A* (Sm A*) and the Smectic C* (Sm C*) phase at equal polymer concentration results in a dielectric strength which is...

  • New experimental evidence about secondary processes in phenylphthalein-dimethylether and 1,1′-bis(p-methoxyphenyl)cyclohexane. Prevosto, D.; Sharifi, S.; Capaccioli, S.; Rolla, P. A.; Hensel-Bielowka, S.; Paluch, M. // Journal of Chemical Physics;9/21/2007, Vol. 127 Issue 11, p114507 

    The slow secondary (β) process of 1,1′-bis (4-methoxyphenyl) cyclohexane and phenolphthalein dimethylether has been investigated by dielectric spectroscopy. New experimental results about the pressure dependence of the two processes are reported, as well as new data about the dependence...

  • Broadband Dielectric Spectroscopy of Albumin-Water Mixture in Frozen State. Yokoyama, A.; Ishikawa, H.; Shinohara, M.; Shinyashiki, N.; Yagihara, S.; Hayashi, Y. // AIP Conference Proceedings;2006, Vol. 832 Issue 1, p163 

    Broadband dielectric spectroscopy (BDS) measurements of 40 wt% bovine serum albumin (BSA)-water mixture under frozen state were carried out in the frequency range of 20Hz to 1.8GHz in the temperature range of -70 to -4°C. Three relaxation processes were observed in addition to the low...

  • An improved theory of multiphonon relaxation in solids. Egorov, S. A.; Skinner, J. L. // Journal of Chemical Physics;12/8/1996, Vol. 105 Issue 22, p10153 

    We derive a general formula, using Fermi’s golden rule, for the multiphonon relaxation rate for a two-level system coupled off-diagonally to a bath of phonons. Our result is valid for any scalar form of the system-bath interaction potential. With our result we analyze experimental data...

  • Phonon relaxation processes in crystals (NaNO3) at high pressure and low temperature. Jordan, M.; Schuch, A.; Righini, R.; Signorini, G. F.; Jodl, H.-J. // Journal of Chemical Physics;9/1/1994, Vol. 101 Issue 5, p3436 

    NaNO3 is investigated in a diamond anvil cell in the pressure range of 0–9 GPa at 21 and 142 K by means of high-resolution Raman spectroscopy (HRRS). The pressure dependent linewidth of ν1 (symmetric stretch) is determined and discussed in the framework of anharmonic lattice dynamics....

  • Stabilization effect in ferroelectric materials during aging in ferroelectric state. Sun, Dazhi; Ren, Xiaobing; Otsuka, Kazuhiro // Applied Physics Letters;10/3/2005, Vol. 87 Issue 14, p142903 

    We report that aging in ferroelectric state results in an increase of reverse transition temperature Tf in both BaTiO3 single crystal and Pb0.84La0.16Ti0.96O3 polycrystal. This indicates that the ferroelectric phase is gradually stabilized during aging below Curie temperature. The evolution of...

  • Oxygen-vacancy-related dielectric relaxation in SrBi[sub 2]Ta[sub 1.8]V[sub 0.2]O[sub 9] ferroelectrics. Wu, Yun; Forbess, Mike J.; Seraji, Seana; Limmer, Steven J.; Chou, Tammy P.; Cao, Guozhong // Journal of Applied Physics;5/15/2001, Vol. 89 Issue 10, p5647 

    The strontium bismuth tantalate vanadate, SrBi[sub 2]Ta[sub 1.8]V[sub 0.2]O[sub 9], (SBTV) layered perovskite ferroelectrics were made by solid state powder sintering. It was found that the SBTV ferroelectrics had the same crystal structure as that of strontium bismuth tantalate, SrBi[sub...

  • Fabrication and properties of epitaxial ferroelectric heterostructures with (SrRuO[sub 3]).... Eom, C.B.; Van Dover, R.B. // Applied Physics Letters;11/1/1993, Vol. 63 Issue 18, p2570 

    Presents result of epitaxial ferroelectric heterostructures with strontium ruthenium oxide electrodes on strontium-titanium oxygen and silicon. Growth of structure in situ by 90 degrees off-axis sputtering; Manifestation of optimum conditions for growing epitaxial layers; Examination of...

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