TITLE

Polarization dynamics in a ferroelectric relaxor excited by short pulses

AUTHOR(S)
Boscolo, I.; Cialdi, S.
PUB. DATE
April 2003
SOURCE
Applied Physics Letters;4/14/2003, Vol. 82 Issue 15, p2500
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Polarization dynamics in a relaxor ferroelectric is investigated by exciting samples, set at different temperatures, with short high voltage (≈ 1 kV) rectangular pulses (≈200 ns) and then by measuring the charge carried to the sample, i.e., the polarization. Further important information is extracted from the trailing edge of the charge signals, which detect the relaxation of the polarization. Polarization dynamics of zero-field-cooled samples show a logarithmic increase during the voltage pulse plateau and a logarithmic decay after the pulse. The slopes depend on the field amplitude and temperature. The model of reorientable noninteracting polar clusters adequately describes the experimental behaviors.
ACCESSION #
9465087

 

Related Articles

  • Polarization mechanism of ferroelectric lattice instability in crystals. Kvyatkovskii, O. E. // Physics of the Solid State;Apr97, Vol. 39 Issue 4, p602 

    It is shown that the intercell dipole-dipole (polarization) interaction lowers the frequencies of the polar transverse-optical (TO) lattice vibrational modes (to a greater extent, the larger the corresponding dipole oscillator strengths) and can be a cause of ferroelectric instability in...

  • Polarization Anomalies in a Relaxor Ferroelectric. Gladkii, V. V.; Kirikov, V. A.; Nekhlyudov, S. V.; Volk, T. R.; Ivleva, L. I. // JETP Letters;1/10/2000, Vol. 71 Issue 1, p24 

    With a strontium barium niobate crystal used as an example, it is experimentally demonstrated that relaxor ferroelectrics exhibit pronounced polarization anomalies, which manifest themselves in the difference between the trajectories of the dielectric hysteresis observed in several repeated...

  • Manifestation of a Structural Disorder in the Polarization Kinetics of a KD[sub 2]PO[sub 4] Ferroelectric. Gladkii, V. V.; Kirikov, V. A. // Physics of the Solid State;Jan2001, Vol. 43 Issue 1, p113 

    Crystalline potassium dideuterophosphate subjected to a slowly varying or a dc electric field has been found to exhibit polarization features which indicate the presence of a structural disorder characteristic of inhomogeneous systems. Continuous distribution spectra of the relaxation time are...

  • Polarization reversal in a perovskite ferroelectric by molecular-dynamics simulation. Sepliarsky, M.; Phillpot, S. R.; Streiffer, S. K.; Stachiotti, M. G.; Migoni, R. L. // Applied Physics Letters;12/24/2001, Vol. 79 Issue 26, p4417 

    We characterize the microscopic processes that take place during polarization reversal in the tetragonal phase of a monodomain order–disorder perovskite ferroelectric using molecular-dynamics simulation. Microscopically the polarization of each unit cell reorients from an [001]...

  • Simple model of polarization offset of graded ferroelectric structures. Pintilie, L.; Boerasu, I.; Gomes, M. J. M. // Journal of Applied Physics;6/15/2003, Vol. 93 Issue 12, p9961 

    The abnormal polarization offset observed in case of graded ferroelectric structures is explained assuming the presence of a nonreversible part of polarization due to the imposed polarization gradient. It is shown that an upper limit for the offset should exist, fixed by the remnant polarization...

  • Fluctuon effects in ferroelectric polarization switching. Molotskii, M.; Kris, R.; Rosenman, G. // Journal of Applied Physics;11/1/2000, Vol. 88 Issue 9, p5318 

    Examines fluctuation effects in ferroelectric polarization switching. Combined contribution of the energy of depolarization field and the surface energy of the nucleus; Repolarization nuclei form by a fluctuon mechanism; Calculation of the electronic structure of the nuclei with...

  • Relaxational polarization dynamics in soft ferroelectrics. Chen, Yun-Han; Viehland, Dwight // Applied Physics Letters;7/3/2000, Vol. 77 Issue 1 

    Investigations of the frequency dependence of the P-E (polarization versus field) and ε-E (strain versus field) behavior have been performed on soft 0.7Pb(Mg[sub 1/3]Nb[sub 2/3])O[sub 3]-0.3PbTiO[sub 3] polycrystalline ferroelectrics at various maximum field strengths below and above that of...

  • Characterization and model of ferroelectrics based on experimental Preisach density. Cima, Lionel; Laboure, Eric; Muralt, Paul // Review of Scientific Instruments;Oct2002, Vol. 73 Issue 10, p3546 

    In this article an experimental method of characterization and modeling of ferroelectric materials is presented. The reversible and irreversible contributions of polarization are separated. The measurements of these effects are performed simultaneously giving a perfect separation. Investigations...

  • Local polarization reversal of LiNbO[sub 3] by scanning the surface perpendicular to the axis of spontaneous polarization with a needle-shaped electrode. Fregatov, S. O.; Sherman, A. B. // Technical Physics Letters;Mar98, Vol. 24 Issue 3, p229 

    The principle of local polarization reversal of ferroelectrics using a moving needle-shaped electrode was used to make a comparative study of the characteristics of polarization reversal of LiNbO[sub 3] from the Z(001) and Y(010) surfaces. In addition to chemical etching, an optical polarization...

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