1 edition of Ferro- and antiferroelectric substances found in the catalog.
Ferro- and antiferroelectric substances
English and German. Added t.p. in German. Bibliography: p. 544-570.
|Other titles||Ferro- und Antiferroelektrische Substanzen|
|Series||Landolt-Börnstein numerical data and functional relationships in science and technology. New series, group III: Crystal and solid state physics, v. 3|
|Contributions||Mitsui, Toshio, Hellwege, K.H., Hellwege, A.M.|
|The Physical Object|
|Pagination||viii, 584 p. ;|
|Number of Pages||584|
Antiferroelectric liquid-crystalline substances having three phenyl rings in their molecular core are intensively studied as components of mixtures for next generation liquid crystal displays [,, ]. These substances have usually rich phase polymorphism containing liquid crystalline, glassy, and metastable or stable crystalline phases [ 4, 5 ].Cited by: 1. 3 has an antiferroelectric (AFE) structure at room temperature and exhibits an unusual complex sequence of temperature and pressure driven structural phase transitions which are not clearly understood. T he antiferroelectric materials are essentially non-polar but revert to a ferroelectric (FE) polar state when subjected to an external field.
Molecular dynamics in the para-, ferro- and antiferroelectric liquid-crystalline phases. • Arrhenius diagram for liquid-crystalline, crystal and glassy phases. • The cold crystallization studied by DSC and BDS methods. • Mo model describing the cold by: 1. Ferro- and Antiferroelectric Properties of Langmuir-Blodgett Films Composed of Mesogenic Bent-Core Molecules Article in Ferroelectrics (1) December with 12 Reads How we measure 'reads'.
Both relaxor ferroelectric and antiferroelectric materials can individually demonstrate large electrocaloric effects (ECE). However, in order to further enhance the ECE it is crucial to find a Cited by: Monte Carlo simulation of dieletric properties of the antiferroelectric the multiferroic bilayer has become the focus of magnetoelectric materials due to its excellent magnetic and electrical properties. Carlo simulation has been applied to investigate the dielectric and polarization in two-dimensional ferroelectric or ferro Cited by: 5.
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OCLC Number: Notes: Added t.p.: Ferro- and antiferroelectric substances. Description: viii, pages: illustrations ; 28 cm. Series Title. ISBN: OCLC Number: Notes: Added t.p.: Ferro- and antiferroelectric substances. "Supplement and extension to volume 3.".
This book presents the basic physics of ferroelectric and antiferroelectric liquid crystals in a simple and transparent way.
It treats both the basic and the applied aspects of ferroelectric and antiferroelectric liquid crystal research, starting from the discovery of ferroelectricity in liquid crystals in and ending with the resonant X. Provides a comprehensive overview of the emerging applications of ferroelectric materials in energy harvesting and storage Conventional ferroelectric materials are normally used in sensors and actuators, memory devices, and field effect transistors, etc.
Recent progress in this area showed that ferroelectric materials can harvest energy from multiple sources including mechanical energy. Ferro- and antiferroelectric substances: supplement and extension to volume 3 By K-H Hellwege and A M Hellwege Topics: Other Fields of PhysicsAuthor: K-H Hellwege and A M Hellwege.
It is demonstrated that the substances with small difference in the free energies of the Ferro- and antiferroelectric substances book and antiferroelectric phases possess a set of properties characteristic for the so-called "dipole glasses".
Possible phase diagrams of the substances that can be misguidedly attributed to glasses are discussed. Main attention has been paid to the process of long-time relaxation of physical Author: V. Ishchuk, V. Sobolev. A unique antiferroelectric to relaxor phase transition has furthermore been demonstrated in this system.
The present study clarifies rich physical properties to expand the frontier of zeolite-type compounds, providing a useful platform to develop novel materials with useful dielectric and structural : Toru Wakamatsu, Genta Kawamura, Tomohiro Abe, Yuki Nakahira, Shogo Kawaguchi, Chikako Moriyoshi, Yos.
Antiferroelectric (AFE) materials with adjacent dipoles oriented in antiparallel directions have a double polarization hysteresis loops. An electric field (E-field)-induced AFE–ferroelectric (FE) phase transition takes place in such materials, leading to a large lattice strain and energy by: Guilhermina F.
Teixeira, Maria A. Zaghete, in Magnetic, Ferroelectric, and Multiferroic Metal Oxides, Abstract. Ferroelectric materials have constantly attracted scientific interest because of their technological applications.
The efficiency of ferroelectrics materials is related to the way they are processed because characteristics such as chemical purity, phase homogeneity, and. In an antiferroelectric, unlike a ferroelectric, the total, macroscopic spontaneous polarization is zero, since the adjacent dipoles cancel each other out.
Antiferroelectricity is a property of a material, and it can appear or disappear (more generally, strengthen or weaken) depending on temperature, pressure, external electric field, growth method, and other parameters. Studies of ferro-and antiferroelectric smectic liquid crystals (SmC * and SmC * A) of twoand tristable switching time suitable for display applications have been intensively developed [1,  [5.
Can the Substances with Coexisting Ferroelectric and Antiferroelectric Phases Mimic the Dipole-Glass Behavior. Article in Ferroelectrics (1) January with 14 Reads. Antiferroelectric behavior is normally observed in inorganic materials, and antiferroelectric polymers are rare .Unlike linear dielectrics, ferroelectrics, or relaxor dielectrics, in which the dielectric properties are weakly dependent on or decrease with the electric field, the dielectric properties of antiferroelectric materials can be significantly enhanced at a high field due to the.
The recent progress in ferroelectricity and antiferroelectricity in HfO 2 ‐based thin films is reported. Most ferroelectric thin film research focuses on perovskite structure materials, such as Pb(Zr,Ti)O 3, BaTiO 3, and SrBi 2 Ta 2 O 9, which are considered to be feasible candidate materials for non‐volatile semiconductor memory r, these conventional ferroelectrics suffer Cited by: Electric-field-induced transition between ferro- and antiferroelectric ground states observed in the B7 phase of a bent-shaped molecule with alkylthio tails S.
Cited by: 7. Many of the uses of ferroelectric materials involve such property changes. Antiferroelectric Materials. Materials with sublattices containing compensating dipoles may be called antiferroelectric, by analogy with antiferromagnetic materials.
Such nonpolar arrangements are found in NH4H2PO4 below K and in PbZrO3 and NaNbO3 at room. Ferroelectricity, property of certain nonconducting crystals, or dielectrics, that exhibit spontaneous electric polarization (separation of the centre of positive and negative electric charge, making one side of the crystal positive and the opposite side negative) that can be reversed in direction by the application of an appropriate electric field.
Thus, the prefix ferro, meaning iron, was used to describe the property despite the fact that most ferroelectric materials do not contain iron. Materials that are both ferroelectric and ferromagnetic are known as multiferroicsferroelectric: non ferroelectric.
The examples of antiferroelectric materials are as follows. PbZrO 3 (Lead Zirconate) NH 4 H 2 PO 4 (ADP: Ammonium dihydrogen Phosphate) NaNbO 3 (Sodium Niobate) Antiferroelectricity and Temperature. The antiferroelectric property will vanish above a particular temperature.
This we can call as Antiferroelectric Curie point. The magnetic dipoles of Fe, Co and Ni are arranged parallel due to the creation of positive exchange energy between them. The ratio of atomic spacing to the diameter of the 3d orbit is in the range of to for Fe, Co and Ni for which this parallel alignment occurs whereas for manganese and chromium a/d does not fall in this range.
These compounds possess the paraelectric SmA, the ferroelectric SmC*, the antiferroelectric SmC*A, the re-entrant ferroelectric SmC*re, and the ferroelectric hexatic phases down to room temperature.
The orientational ordering properties of the two labeled fragments have been determined by means of DNMR, and the mesophase behavior at two Cited by: paper, these materials, which include hydrogen-bonded antiferroelectrics and antiferroelectric liquid crystals, will not be discussed.
Rather, the focus is on antiferroelec-tricity in oxides, which requires a more broadly applicable deﬁnition of antiferroelectricity and criteria for establish-ing a material as antiferroelectric.