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Diffuse Scattering And Local Order In Lead Based Relaxor Ferroelectrics
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Book Synopsis Diffuse Scattering and Local Order in Lead-based Relaxor Ferroelectrics by : Matthew J. Krogstad
Download or read book Diffuse Scattering and Local Order in Lead-based Relaxor Ferroelectrics written by Matthew J. Krogstad and published by . This book was released on 2018 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Relaxor ferroelectrics are characterized by their dielectric permittivity, and some of these materials display outstanding electromechanical coupling, a property that makes them useful in applications from sonar and ultrasound to precision actuators. However, there is a surprising lack of consensus regarding the local structure of these materials and how it relates to their useful bulk properties. A common feature of many proposed mechanisms is the importance of short-range order differing from the long-range symmetry of the material. Such a difference between short-range and long-range order makes these materials ideal candidates for study via diffuse scattering, a technique sensitive to differences between local and average structure. Using modern techniques that allow a survey of a large volume of reciprocal space comprising dozens of Brillouin zones, diffuse neutron scattering data from across the entire phase diagram of the canonical relaxor ferroelectric system PMN-xPT has been collected, allowing for the identification of relevant diffuse scattering features. Complementary x-ray diffuse scattering measurements confirm the presence of these features, and the difference between scattering lengths of the two techniques provides contrast that shows how the different atoms in the material behave. By characterizing how these features evolve with temperature and composition, they provide a connection between the bulk properties of the system and local atomic displacements and correlations underlying these bulk properties. Four main components of diffuse scattering were found. Ferroic diffuse scattering, centered on the Bragg peak, is found to correlate in intensity to the strength of piezoelectric coupling and not directly to relaxational behavior. This study finds new structure to this component that indicates a significant role for correlated oxygen displacements in determining local polar structures. Broad, temperature-dependent diffuse peaks centered on M points in the Brillouin zone are indicative of antiferroelectric behavior that become a clear proxy for bulk relaxor behavior. Temperature-independent peaks centered on R points indicate chemical short-range order for pure PMN and are suppressed with the addition of titanium, suggesting that chemical order may seed relaxational character but is not responsible for piezoelectricity. Finally, size-effect scattering is identified and separated from other components, indicating highly anisotropic local environments. These findings are extended by studies of the electric field dependence of diffuse scattering from PMN-30PT which confirm the ferroic nature of diffuse scattering close to the Bragg peak and indicate that the local distortions revealed through size-effect diffuse scattering remain locally dominant even at high electric fields. The identification of similar features in diffuse scattering from the related material PZT indicates the applicability of these results to other lead-based perovskites with competing ferroic orders.
Book Synopsis Nanoscale Ferroelectrics and Multiferroics by : Miguel Alguero
Download or read book Nanoscale Ferroelectrics and Multiferroics written by Miguel Alguero and published by John Wiley & Sons. This book was released on 2016-05-31 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dieses Buch beleuchtet die wichtigsten Aspekte der Verarbeitung und Charakterisierung von Ferroelektrika und Multiferroika auf Nanoebene, präsentiert eine umfassende Beschreibung der jeweiligen Eigenschaften und legt dabei den Schwerpunkt auf die Unterscheidung von Größeneffekten bei extrinsischen Eigenschaften wie Rand- oder Interface-Effekte. Eingegangen wird auch auf neuartige Nanoebene. Das Fachbuch ist in drei Abschnitte unterteilt und beschreibt die Verarbeitung (Nanostrukturierung), Charakterisierung (nanostrukturierter Materialien) und Nanoeffekte. Unter Rückgriff auf die Synergien zwischen Nano-Ferroelektrika und -Multiferroika werden Materialien behandelt, die auf allen Ebenen einer Nanostrukturierung unterzogen werden, von Technologien für keramische Materialien wie ferroelektrische Nanopulver, nanostrukturierte Keramiken und Dickschichten sowie magnetoelektrische Nanokomposit-Materialien bis hin zu freistehenden Nanoobjekten mit spezifischen Geometrien wie Nanodrähte und Nanoröhren auf verschiedenen Entwicklungsstufen. Grundlage des Buches ist die europäische Wissensplattform im Wissenschaftsbereich innerhalb der Aktion von COST (Europäische Zusammenarbeit in Wissenschaft und Technik) zu ein- und mehrphasigen Ferroika und Multiferroika mit begrenzten Geometrien (SIMUFER, Ref. MP0904). Die Autoren der Kapitelbeiträge wurden sorgfältig ausgewählt, haben allesamt ganz wesentlich zur Wissensbasis für das jeweilige Thema beigetragen und gehören vor allem zu den renommiertesten Wissenschaftlern des Fachgebiets.
Book Synopsis The Electrocaloric Effect by : Andrei L. Kholkin
Download or read book The Electrocaloric Effect written by Andrei L. Kholkin and published by Elsevier. This book was released on 2023-02-16 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Electrocaloric Effect: Materials and Applications reviews the fundamentals of the electrocaloric effect, the most relevant electrocaloric materials, and electrocaloric measurements and device applications. The book introduces the electrocaloric effect, along with modeling and simulations of this effect. Then, it addresses the latest advances in synthesis, characterization and optimization of the most relevant electrocaloric materials, including ferroelectric materials, liquid materials, lead-free materials, polymers and composites. Finally, there is a review of the latest techniques in measurement and applications in refrigeration and cooling and a discussion of the advantages, challenges and perspectives of the future of electrocaloric refrigeration. Provides a comprehensive introduction to the electrocaloric effect including experimental techniques to measure, model, and simulate the effect Reviews the most relevant electrocaloric materials such as composites, polymers, metal oxides, ferroelectric materials, and more Touches on the design and application of electrocaloric materials for devices with potential cooling and refrigeration applications
Download or read book Domain Walls written by Dennis Meier and published by Oxford University Press, USA. This book was released on 2020-09 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the first of its kind, this book identifies major questions and challenges that will influence research on domain walls in the years to come.
Book Synopsis Multifunctional Ferroelectric Materials by : Dipti Ranjan Sahu
Download or read book Multifunctional Ferroelectric Materials written by Dipti Ranjan Sahu and published by BoD – Books on Demand. This book was released on 2021-09-08 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ferroelectricity is a well-known phenomenon commonly used in scientific and industrial communities. Ferroelectric materials are the building blocks of different devices and technological innovations. This book presents an overview of the basic phenomenon of ferroelectricity and different ferroelectrics and ferroelectric devices, including their theoretical study, synthesis, characterization, and application. Chapters cover such topics as the basics of ferroelectricity, perovskite ferroelectrics and relaxor ferroelectrics, piezoelectricity, and more.
Book Synopsis Underneath the Bragg Peaks by : Takeshi Egami
Download or read book Underneath the Bragg Peaks written by Takeshi Egami and published by Elsevier. This book was released on 2003-10-02 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Table of contents
Book Synopsis Nanoscopic Study of the Polarization-Strain Coupling in Relaxor Ferroelectric and the Search for New Relaxor Materials for Transducer and Optical Applications by :
Download or read book Nanoscopic Study of the Polarization-Strain Coupling in Relaxor Ferroelectric and the Search for New Relaxor Materials for Transducer and Optical Applications written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Relaxor ferroelectrics exhibit a very unusual polarization behavior from which derive unique electrostrictive, piezoelectric and other properties. This behavior and these properties are due to the presence of nanoscale structural and polar order, the polar nanoregions (PNR), which can easily reorient under very modest external electric field, in stark contrast with conventional ferroelectrics. Moreover, when these nanoregions are aligned, their local distortions add up coherently to a macroscopic strain, hence their remarkable electrostrictive and piezoelectric properties. Initially, we demonstrated this effect in KTa1-xNbxO3 (KTN) and were able to identify the local internal symmetry of the PNR in KTN and explain their behavior under an applied electric field. We then extended the study to the more complicated lead relaxors, PbMg1/3Nb2/3O3 (PMN), PbZn1/3Nb2/3O3 (PZN) and (1-x)(PbZn1/3Nb2/3)O3-(x)PbTiO3 (PZN-PT). In particular, following the evolution of the diffuse intensity in neutron scattering and X-ray measurements, we were able to determine the evolution of the polar order from the pure PZN system to the mixed system, PZN-PT. This evolution with addition of PT, provides a physical basis for the remarkably easy polarization rotation that gives PZN-PT its unique properties for composition near the so-called morphotropic boundary (MPB). Through quasi-elastic and inelastic neutron and Raman scattering, we also obtained information about the local (nano)dynamics of these PNR's. We thus identified three ranges in the evolution of the polarization with temperature: a purely dynamic range, a quasi-dynamic range when the PNR's appear but can still reorient as "giant dipoles", a quasi-static range when the system undergoes a series of "underlying" or partial transitions (on a mesoscopic scale) and, finally a frozen range below the last one of these transitions". This work has provided a useful framework to describe the structural and temperature evolution from the nanoscopic to the mesoscopic polar order and even to a macroscopic polar order in the presence of an applied electric field. The results of this study also provide a physical model to explain the very strong polarization-strain coupling in these relaxors.
Book Synopsis Journal of the Physical Society of Japan by : Nihon Butsuri Gakkai
Download or read book Journal of the Physical Society of Japan written by Nihon Butsuri Gakkai and published by . This book was released on 2004 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Ferroelectrics by : Aimé Peláiz-Barranco
Download or read book Advances in Ferroelectrics written by Aimé Peláiz-Barranco and published by BoD – Books on Demand. This book was released on 2012-11-19 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ferroelectricity is one of the most studied phenomena in the scientific community due the importance of ferroelectric materials in a wide range of applications including high dielectric constant capacitors, pyroelectric devices, transducers for medical diagnostic, piezoelectric sonars, electrooptic light valves, electromechanical transducers and ferroelectric random access memories. Actually the ferroelectricity at nanoscale receives a great attention to the development of new technologies. The demand for ferroelectric systems with specific applications enforced the in-depth research in addition to the improvement of processing and characterization techniques. This book contains twenty two chapters and offers an up-to-date view of recent research into ferroelectricity. The chapters cover various formulations, their forms (bulk, thin films, ferroelectric liquid crystals), fabrication, properties, theoretical topics and ferroelectricity at nanoscale.
Book Synopsis 20. Jahrestagung der Deutschen Gesellschaft für Kristallographie; March 2012, Munich, Germany by :
Download or read book 20. Jahrestagung der Deutschen Gesellschaft für Kristallographie; March 2012, Munich, Germany written by and published by Walter de Gruyter GmbH & Co KG. This book was released on 2015-09-25 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zeitschrift für Kristallographie. Supplement Volume 32 presents the complete Abstracts of all contributions to the 20th Annual Conference of the German Crystallographic Society in Munich 2012: - Plenary Talks - Microsymposia - Poster Session Supplement Series of Zeitschrift für Kristallographie publishes Proceedings and Abstracts of international conferences on the interdisciplinary field of crystallography.
Book Synopsis Advanced Ferroelectricity by : Robert Blinc
Download or read book Advanced Ferroelectricity written by Robert Blinc and published by OUP Oxford. This book was released on 2011-08-25 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of ferroelectricity has greatly expanded and changed in recent times. In addition to classical organic and inorganic ferroelectrics, new fields and materials, unknown or inactive 20 to 40 years ago, have appeared. They are important for both basic science and applications, and show technological promise for novel multifunctional devices. New fields include multiferroic magnetoelectric systems, where spontaneous polarization and spontaneous magnetization are allowed to coexist; incommensurate ferroelectrics, where the periodicity of the order parameter is incommensurate to the periodicity of the underlying basic crystal lattice; ferroelectric liquid crystals; dipolar glasses; relaxor ferroelectrics; ferroelectric thin films; nanoferroelectrics. These new fields are not only of basic physical interest, but also of great technological importance, allowing the design of new memory devices, spintronic applications, and the design of electro-optic devices. They are also important for applications in acoustics, robotics, telecommunications and medicine. The book is primarily intended for material scientists working in research or industry. It is also intended for graduate and doctoral students and can be used as a textbook in graduate courses. Finally, it should be useful for anybody interested in following the developments in modern solid state physics.
Book Synopsis Frustrated Materials and Ferroic Glasses by : Turab Lookman
Download or read book Frustrated Materials and Ferroic Glasses written by Turab Lookman and published by Springer. This book was released on 2018-11-01 with total page 283 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive introduction to ferroics and frustrated materials. Ferroics comprise a range of materials classes with functionalities such as magnetism, polarization, and orbital degrees of freedom and strain. Frustration, due to geometrical constraints, and disorder, due to chemical and/or structural inhomogeneities, can lead to glassy behavior, which has either been directly observed or inferred in a range of materials classes from model systems such as artificial spin ice, shape memory alloys, and ferroelectrics to electronically functional materials such as manganites. Interesting and unusual properties are found to be associated with these glasses and have potential for novel applications. Just as in prototypical spin glass and structural glasses, the elements of frustration and disorder lead to non-ergodocity, history dependence, frequency dependent relaxation behavior, and the presence of inhomogeneous nano clusters or domains. In addition, there are new states of matter, such as spin ice; however, it is still an open question as to whether these systems belong to the same family or universality class. The purpose of this work is to collect in a single volume the range of materials systems with differing functionalities that show many of the common characteristics of geometrical frustration, where interacting degrees of freedom do not fit in a lattice or medium, and glassy behavior is accompanied by additional presence of disorder. The chapters are written by experts in their fields and span experiment and theory, as well as simulations. Frustrated Materials and Ferroic Glasses will be of interest to a wide range of readers in condensed matter physics and materials science.
Download or read book JJAP Letters written by and published by . This book was released on 2001 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Thomas Richard Welberry Publisher :Oxford University Press on Demand ISBN 13 :0198528582 Total Pages :281 pages Book Rating :4.1/5 (985 download)
Book Synopsis Diffuse X-Ray Scattering and Models of Disorder by : Thomas Richard Welberry
Download or read book Diffuse X-Ray Scattering and Models of Disorder written by Thomas Richard Welberry and published by Oxford University Press on Demand. This book was released on 2004-09-09 with total page 281 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diffuse X-ray scattering is a rich (virtually untapped) source of local structural information over and above that obtained by conventional crystallography. The book aims to show how computer simulation of a model crystal provides a general method by which diffuse scattering of all kinds and from all types of materials can be interpreted and analysed.
Download or read book JJAP written by and published by . This book was released on 1990 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Diffuse Scattering and Defect Structure Simulations by : Reinhard B. Neder
Download or read book Diffuse Scattering and Defect Structure Simulations written by Reinhard B. Neder and published by Oxford University Press. This book was released on 2008-11-20 with total page 239 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the atomic structure of complex and time disordered materials relies upon computer simulations of these structures. This cook book provides a unique mixture of simulation know-how and hands on examples. All related files and the program DISCUS are included on a CDROM with the book.
Book Synopsis Handbook of Advanced Dielectric, Piezoelectric and Ferroelectric Materials by : Z-G Ye
Download or read book Handbook of Advanced Dielectric, Piezoelectric and Ferroelectric Materials written by Z-G Ye and published by Elsevier. This book was released on 2008-03-20 with total page 1091 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive book covers recent developments in advanced dielectric, piezoelectric and ferroelectric materials. Dielectric materials such as ceramics are used to manufacture microelectronic devices. Piezoelectric components have been used for many years in radioelectrics, time-keeping and, more recently, in microprocessor-based devices. Ferroelectric materials are widely used in various devices such as piezoelectric/electrostrictive transducers and actuators, pyroelectric infrared detectors, optical integrated circuits, optical data storage and display devices.The book is divided into eight parts under the general headings: High strain high performance piezo- and ferroelectric single crystals; Electric field-induced effects and domain engineering; Morphotropic phase boundary related phenomena; High power piezoelectric and microwave dielectric materials; Nanoscale piezo- and ferroelectrics; Piezo- and ferroelectric films; Novel processing and new materials; Novel properties of ferroelectrics and related materials. Each chapter looks at key recent research on these materials, their properties and potential applications.Advanced dielectric, piezoelectric and ferroelectric materials is an important reference tool for all those working in the area of electrical and electronic materials in general and dielectrics, piezoelectrics and ferroelectrics in particular. Covers the latest developments in advanced dielectric, piezoelectric and ferroelectric materials Includes topics such as high strain high performance piezo and ferroelectric single crystals Discusses novel processing and new materials, and novel properties of ferroelectrics and related materials
