Dielectric relaxation and relaxor behavior in bilayered perovskites

González-Abreu, Y.; Peláiz-Barranco, A.; Araújo, E. B.; Júnior, A. Franco
June 2009
Applied Physics Letters;6/29/2009, Vol. 94 Issue 26, p262903
Academic Journal
Sr0.5Ba0.5Bi2Nb2O9 ferroelectric ceramics exhibit a complex dielectric behavior, showing typical relaxor behavior. The relaxation processes are described by the Cole–Cole model [K. S. Cole and R. H. Cole, J. Chem. Phys. 9, 341 (1941)]. At temperatures below 490 K, the dielectric relaxation is associated to the relaxorlike ferroelectric behavior, resulting from the inhomogeneous distribution of barium due to its preference for the bismuth site. Above that, the interaction between the dipoles, which form the microdomains above the relaxor ferroelectric peak and the electrons, which are due to the ionization of the oxygen vacancies are discussed as the probable origin of the relaxation.


Related Articles

  • Recent progress in relaxor ferroelectrics with perovskite structure. Bokov, A. A.; Ye, Z.-G. // Journal of Materials Science;Jan2006, Vol. 41 Issue 1, p31 

    Relaxor ferroelectrics were discovered almost 50 years ago among the complex oxides with perovskite structure. In recent years this field of research has experienced a revival of interest. In this paper we review the progress achieved. We consider the crystal structure including quenched...

  • Temperature-dependent fatigue behaviors of ferroelectric Pb(Zr0.52Ti0.48)O3 and Pb0.75La0.25TiO3 thin films. Liu, J.-M.; Wang, Y.; Zhu, C.; Yuan, G. L.; Zhang, S. T. // Applied Physics Letters;7/25/2005, Vol. 87 Issue 4, p042904 

    The polarization switching fatigue of ABO3-perovskite ferroelectric thin-film Pb(Zr0.52Ti0.48)O3 (PZT) prepared by metalorganic decomposition (MOD) and Pb0.75La0.25TiO3 (PLT) prepared by pulsed laser deposition (PLD), are investigated. The temperature as a degree of freedom is employed to...

  • Relaxor behavior of (1 − x)BaTiO3– x(Bi3/4Na1/4)(Mg1/4Ti3/4)O3 (0.2 ≤ x ≤ 0.9) ferroelectric ceramic. Liying Wu; Xiaoli Wang; Wang, Jimmy H.; Guo, Ruyan; Bhalla, Amar S. // Journal of Materials Science;Oct2009, Vol. 44 Issue 19, p5420 

    The (1 − x)BaTiO3– x(Bi3/4Na1/4)(Mg1/4Ti3/4)O3 (0.2 ≤ x ≤ 0.9) ceramics were prepared by conventional solid-state reaction route. Their dielectric properties were found to follow a modified Curie–Weiss law and an empirical Lorenz-type relation in respective...

  • On the feasibility of synthesizing complex perovskite ferroelectric ceramics via a B-site oxide mixing route. Bijun Fang; Renbing Sun; Shan, Yuejin; Tezuka, Keitaro; Imoto, Hideo // Journal of Materials Science;Nov2007, Vol. 42 Issue 22, p9227 

    Several relaxor-based complex perovskite ferroelectric ceramics were synthesized by conventional solid-state reaction method via different routes, i.e., the B-site oxide mixing route, the straight calcination method and the columbite/wolframite precursor method. Structure analysis and physical...

  • Features of the Relaxation Polarization of a Polar Dielectric under Conditions of Large Electrothermal Loads. Emel’yanov, O. A. // Technical Physics Letters;Nov2002, Vol. 28 Issue 11, p939 

    In a polar dielectric occurring under the conditions of large electrothermal loads, it is necessary to take into account the temperature dependence of the conductivity γ(T) and complex permittivity ∈(T). An allowance for this circumstance in the simplest model of the Debye relaxation...

  • Low-frequency dielectric relaxation of BaTiO[sub 3] thin-film capacitors. Su-Jae Lee; Kwang-Yong Kang; Seok-Kil Han // Applied Physics Letters;9/20/1999, Vol. 75 Issue 12, p1784 

    Studies the low-frequency dielectric relaxation of ferroelectric BaTiO[sub 3] thin films with perovskite structure. Electric conductivity of the films; Dielectric constant and loss values; Ionized space-charge carriers causing low-frequency dielectric relaxation; Thermal activation energy for...

  • Dielectric relaxation properties of perovskite-pyrochlore biphase ceramics. Yu-Jen Hsiao; Yen-Hwei Chang; Te-Hua Fang; Yee-Shin Chang // Applied Physics Letters;10/3/2005, Vol. 87 Issue 14, p142906 

    The structure and dielectric relaxation properties of (1-x)NaNbO3-xBiCrO3 (0.1≤=x≤=0.5) composite ceramics with perovskite-pyrochlore biphase were studied. The coexistence of cubic perovskite and a cubic pyrochlore structure was characterized. A lack of mutual solubility between the...

  • Manipulation of ferroelectric vortex domains in hexagonal manganites. Lilienblum, M.; Soergel, E.; Fiebig, M. // Journal of Applied Physics;Sep2011, Vol. 110 Issue 5, p052007 

    The modification of ferroelectric vortex domain patterns in hexagonal manganites (here exemplified by YMnO3 and HoMnO3) owing to chemical treatment, thermal annealing, and local electric-field poling is investigated by piezoresponse force microscopy. Chemical treatment transfers the domain...

  • Flexoelectric effect in ceramic lead zirconate titanate. Wenhui Ma; Cross, L. Eric // Applied Physics Letters;2/14/2005, Vol. 86 Issue 7, p072905 

    Mechanical strain gradient generated electric polarization or flexoelectric effect was investigated in unpoled lead zirconate titanate (PZT) ceramics in the ferroelectric state by using a cantilevered beam based approach. Flexoelectric coefficient μ12 at room temperature was measured to be...


Read the Article


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

Try another library?
Sign out of this library

Other Topics