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in subjects: "Ferroelectric Materials"  
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Ferroelectric ceramics for dielectric power conversion. Annual report, March 1, 1979-April 30, 1980

Description: Materials selected for study were those which could be expected to have useful Curie temperatures, resistivities, coercive fields, and Devonshire coefficients. Materials studied include PZT (lead-zirconia-titania system), Bi(Na,K)Ti/sub 2/O/sub 6/, rare earth titanoniobates, other tantalates and niobates, and thin films. Graphs are given for spontaneous polarization as a function of composition, temperature dependence of spontaneous polarization and coercive field for modified PSZT dielectrics,… more
Date: May 1, 1980
Creator: Payne, D. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Physical motivations of the constitutive relations for ferroelectric ceramics and the existence of butterfly and hysteresis loops

Description: The responses of ferroelectric ceramics can be quite complex depending on the physical processes to which they are subjected. Their mechanical, electromechanical and dielectric properties depend on domain switching, dipole dynamics and phase transformation which can be caused by external stimuli such as mechanical and electrical loadings, and temperature variations. A theory, taking into account the effects of domain switching and dipole dynamics, has been formulated, and in its present stage o… more
Date: January 1, 1982
Creator: Chen, P.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Chevron layer structures in surface stabilized ferroelectric liquid crystal (SSFLC) cells filled with a material which exhibits the chiral nematic to smetic C* phase transition

Description: In this paper we report on the layer structure in Surface Stabilized Ferroelectric Liquid Crystal (SSFLC) electro-optic cells, adopted by a compound which exhibit the smectic C* (SC*) to chiral nematic (N*) phase transition. This class of compounds is unique in that the SC* layers form directly from the N* phase. These materials demonstrate a large tilt (/Theta/) of the director (/cflx n/) from the layer normal (/cflx z//prime/) immediately upon cooling into the SC* phase. Recent high resolutio… more
Date: January 1, 1989
Creator: Rieker, T.P.; Clark, N.A. & Safinya, C.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ELECTRON MICROSCOPY STUDY OF THE FERROELECTRIC DOMAINS AND DOMAIN WALL STRUCTURE IN Pb.52Ti.48O3

Description: The crystallography of the domains and domain walls in PZT are studied using electron diffraction and transmission electron microscopy. Both 90{sup o} and 180{sup o} domains are observed and the 90{sup o} domains are shown to be deformation twins with displacement along <110> on {l_brace}110{r_brace}. The thickness of the 90{sup o} domain wall is determined to be {approx}< 100 {angstrom}. Leadon Zirconate Titanate (PZT) is a ferroelectric material at room temperature and it is used ext… more
Date: August 1, 1980
Creator: Goo, E.K.W.; Mishra, R.K. & Thomas, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Studies on ion scattering and sputtering processes relevant to ion beam sputter deposition of multicomponent thin films

Description: Results from computer simulation and experiments on ion scattering and sputtering processes in ion beam sputter deposition of high Tc superconducting and ferroelectric thin films are presented. It is demonstrated that scattering of neutralized ions from the targets can result in undesirable erosion of, and inert gas incorporation in, the growing films, depending on the ion/target atom ass ratio and ion beam angle of incidence/target/substrate geometry. The studies indicate that sputtering Kr{su… more
Date: January 1, 1989
Creator: Auciello, O.; Ameen, M. S.; Kingon, A. I.; Krauss, A. R. & Ray, M. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Solid State Division progress report, September 30, 1981

Description: Progress made during the 19 months from March 1, 1980, through September 30, 1981, is reported in the following areas: theoretical solid state physics (surfaces, electronic and magnetic properties, particle-solid interactions, and laser annealing); surface and near-surface properties of solids (plasma materials interactions, ion-solid interactions, pulsed laser annealing, and semiconductor physics and photovoltaic conversion); defects in solids (radiation effects, fracture, and defects and impu… more
Date: April 1, 1982
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electrooptic shutter devices utilizing PLZT ceramic wafers

Description: Optical transparency was achieved in lead zirconate-titanate ferroelectric ceramics by substituting moderate amounts of the element lanthanum (8 to 12%) for lead. These compositions exhibit the quadratic (Kerr) electrooptic effect. The excellent optical qualities of these materials (designated PLZT) has permitted the practical utilization of their electrooptic properties in a number of devices. All of these devices utilize the classic Kerr cell arrangement. A PLZT wafer with optical axis orient… more
Date: January 1, 1981
Creator: Thornton, Allen L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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