Ferroelectrics (FERROELECTRICS )

Publisher: Taylor & Francis


Ferroelectrics is designed to provide a forum for people working in ferroelectrics and related materials such as ferroelastics, ferroelectric-ferromagnetics, electrooptics, piezoelectrics, pyroelectrics, nonlinear dielectrics, and liquid crystals. Ferroelectrics publishes experimental and theoretical papers aimed at the understanding of ferroelectricity and associated phenomena and applied papers dealing with the utilization of these materials in devices and systems. An important aspect of Ferroelectrics is to provide a vehicle for the publication of interdisciplinary papers involving ferroelectricity. The editor invites original papers and short communications on the theory, fabrication, properties, and applications of ferroelectrics and related materials. In addition to research papers, Ferroelectrics publishes appropriate and timely review articles.

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Taylor & Francis

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Publications in this journal

  • Ferroelectrics 01/2015; 474.
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    ABSTRACT: A new model describing physical structural constraints for the formation of “simple” “ideal” cubic perovskites is introduced and compared with Goldschmidt's tolerance formalism. Through a transformation or mapping into ionic radii space, the structural planar constraints of this new model are compared with the planar constraints of Goldschmidt's formalism, a semi-empirical relationship. The new model indicates: (1) a structural volume instability arises that has consistency with Goldschmidt's tolerance formalism, 0.77 < T < 1.00, for low symmetry crystals; (2) a region of (likely) increased structural stability occurs in close proximity to Goldschmidt's tolerance plane, T = 1.00; and, (3) the possibility for formation of cubic materials far from T = 1.00 including regions outside Goldschmidt's tolerance range, 0.77 < T < 1.05.
    Ferroelectrics 10/2014; 470(1):13-27.
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    ABSTRACT: In the present paper we report the first results of the study of the polar state of the surface structure of single crystal of potassium tantalate doped with Li + ions (KLT-3%) by the piezoresponse force microscopy technique in the temperature range 10–295 K. The results obtained demonstrate the existence of polar nanoregions on the surface of the KLT-3% single crystal at temperatures 10 – 80 K. Spatial distribution and temperature evolution of these polar nanoregions are analyzed. Observation of the structure of polar nanoregions of KLT-3% crystal in zero field heating after zero field cooling regime gives the evidence of the existence of spontaneous polarization in the low-temperature phase
    Ferroelectrics 10/2014; 469:1:73-78.
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    ABSTRACT: The effect of dye dispersion on the surface domain formation at the interface of alignment layer and ferroelectric liquid crystal molecules has been studied. The observed dielectric data clearly shows the existence of two relaxation modes in ferroelectric liquid crystal. The relaxation, which shows its contribution in KHz region, takes place due to the formation of domains at surface interface. In both the cases i.e. dye dispersion in Felix17/100 and in DOBAMBC, relaxation strength decreases with dispersion of dye, indicating the suppression of domains. Relaxation frequency in case of Felix 17/100 decreases while it increases for DOBAMBC with the dispersion of dye. The suppression of these surface domains are beneficial from the application point of view, as these domains are responsible for the scattering of light and suppression of these domains will increase the contrast and brightness of the display.
    Ferroelectrics 07/2014; 468(1):123-131.
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    ABSTRACT: We present a detailed investigation of structural properties of manganese doped strontium titanate ceramics and Verneuil grown single crystals, the last prepared with Sr deficiency compensated by proper Mn amount. EXAFS, TEM, ESR and Raman techniques, combining local and lattice probes, allows to inspect the local chemical environment and electronic structure of manganese taking into account possible chemical non-homogeneities and/or phase segregation. On the basis of experimental evidences, structural models for Mn insertion in SrTiO3 are discussed considering possibility for Mn ions to occupy both Ti4+ and Sr2+ sites as well as manganese segregation and Mn incorporation related non-homogeneities.
    Ferroelectrics 05/2014; 463(1):31-39.
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    ABSTRACT: Recent findings of a large electrocaloric (EC) effect in in polymeric and inorganic ferroelectric materials made this effect an attractive possibility in development of cooling or heating devices of new generation, which would be more environmentally friendly. We report a significant electrocaloric effect near the ferroelectric phase transition in substrate-free [Pb(Mg1/3Nb2/3)O3]1-x[PbTiO3]x (PMN-xPT) with x = 0.30 thick ceramic films on a platinum layer. A method and analysis of direct measurements of the large EC effect are presented. Results confirm that besides the large electrostrictive response already reported in similar self-standing films, the large EC effect of similar magnitude as found in bulk PMN-0.30PT ceramics exists in substrate-free thick films.
    Ferroelectrics 05/2014; 465(1):1-6.
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    ABSTRACT: A 1–3-type ferroelectric ceramic / porous polymer composite is studied to show trends in increasing an anisotropy of piezoelectric coefficients d*33/d*31, electromechanical coupling factors k*33/k*31 and k*t /k*p , a ratio of coefficients of electromechanical transformation N*33/N*31, and a ratio of specific acoustic powers of a piezoelectric element. Effects of the porosity and microgeometry of the porous polymer matrix on volume-fraction behaviour of the effective parameters and anisotropy factors in the composite with 1–3–0 connectivity are first analysed in the context of the elastic anisotropy of the matrix. Five conditions are introduced to describe the large anisotropy of the piezoelectric properties and related parameters. Examples of simultaneous validity of the five conditions put forward are discussed to emphasise advantages of the 1–3–0 composite based on the Pb(Zr, Ti)O3-type ceramic over the related 1–3 composite and conventional ferroelectric ceramics. The d*33/d*31 ratio plays the key role in the formulated conditions over the wide volume-fraction range of the ceramic component and at varying the aspect ratio of the air pores and porosity in the matrix. A correlation between the elastic anisotropy of the porous matrix and minima of three anisotropy factors (k*33/k*31, k*t /k*p and N*33/N*31) is first revealed and discussed.
    Ferroelectrics 02/2014; 460(1).
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    ABSTRACT: The crystal of CsH3(SeO3)2 was confirmed to be triclinic system with the space group P[Inline formula] and to have a superlattice structure below the antiferroelectric phase transition temperature (T N = 149 K). The crystal structure was studied at 103 K below T N by means of the single crystal x-ray diffraction. The final discrepancy factor was reduced to 0.0645. The structure analysis pointed out that all possible positions of atoms are in the ordering state below T N. In order to ascertain the antiferroelectric state in the low phase, the pseudo-moments proportional to the displacements are assumed as the dipole moment of SeO3 tetrahedron.
    Ferroelectrics 01/2014; 462(1).