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Nanoscale Ferroelectric Multiferroic Materials For Energy Harvesting Applications

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Nanoscale Ferroelectric Multiferroic Materials for Energy Harvesting Applications

Nanoscale Ferroelectric Multiferroic Materials for Energy Harvesting Applications Book
Author : Hideo Kimura,Zhenxiang Cheng,Tingting Jia
Publisher : Elsevier
Release : 2019-02-22
ISBN : 0128145005
Language : En, Es, Fr & De

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Book Description :

Nanoscale Ferroelectric-Multiferroic Materials for Energy Harvesting Applications presents the latest information in the emerging field of multiferroic materials research, exploring applications in energy conversion and harvesting at the nanoscale. The book covers crystal and microstructure, ferroelectric, piezoelectric and multiferroic physical properties, along with their characterization. Special attention is given to the design and tailoring of ferroelectric, magnetic and multiferroic materials and their interaction among ferroics. The fundamentals of energy conversion are incorporated, along with the requirements of materials for this process. Finally, a range of applications is presented, demonstrating the progression from fundamentals to applied science. This essential resource describes the link between the basic physical properties of these materials and their applications in the field of energy harvest. It will be a useful resource for graduate students, early career researchers, academics and industry professionals working in areas related to energy conversion. Bridges the gap between the fundamentals and applications of ferroelectric and multiferroic materials for energy harvesting Demonstrates how a range of nanomaterials play an important role in the creation of efficient energy harvesting systems Provides new solutions for the fabrication of electronic devices for various applications

Nanoscale Ferroelectrics and Multiferroics

Nanoscale Ferroelectrics and Multiferroics Book
Author : Miguel Alguero,J. Marty Gregg,Liliana Mitoseriu
Publisher : John Wiley & Sons
Release : 2016-05-31
ISBN : 1118935756
Language : En, Es, Fr & De

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Book Description :

"Covers topics such as nanostructuring, functional ceramics based on nanopowders micromechanical systems, self-assembling and patterning, porous structures etc."--

Nanostructures in Ferroelectric Films for Energy Applications

Nanostructures in Ferroelectric Films for Energy Applications Book
Author : Jun Ouyang
Publisher : Elsevier
Release : 2019-07-15
ISBN : 0128138564
Language : En, Es, Fr & De

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Book Description :

Nanostructures in Ferroelectric Films for Energy Applications: Grains, Domains, Interfaces and the Engineering Methods presents methods of engineering nanostructures in ferroelectric films to improve their performance in energy harvesting and conversion and storage. Ferroelectric films, which have broad applications, including the emerging energy technology, usually consist of nanoscale inhomogeneities. For polycrystalline films, the size and distribution of nano-grains determines the macroscopic properties, especially the field-induced polarization response. For epitaxial films, the energy of internal long-range electric and elastic fields during their growth are minimized by formation of self-assembled nano-domains. This book is an accessible reference for both instructors in academia and R&D professionals. Provides the necessary components for the systematic study of the structure-property relationship in ferroelectric thin film materials using case studies in energy applications Written by leading experts in the research areas of piezoelectrics, electrocalorics, ferroelectric dielectrics (especially in capacitive energy storage), ferroelectric domains, and ferroelectric-Si technology Includes a well balanced mix of theoretical design and simulation, materials processing and integration, and dedicated characterization methods of the involved nanostructures

Science

Science Book
Author : Anonim
Publisher : Unknown
Release : 2009
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Download Science book written by , available in PDF, EPUB, and Kindle, or read full book online anywhere and anytime. Compatible with any devices.

On the Thermodynamic Efficiency of a Multiferroic Thermomagnetic Generator

On the Thermodynamic Efficiency of a Multiferroic Thermomagnetic Generator Book
Author : Samuel Mancilla Sandoval
Publisher : Unknown
Release : 2014
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

A unique multiferroic type of thermomagnetic generator is being investigated in order to establish its thermodynamic efficiency at different size scales. This device generates electricity when a magnetic material interacts with a thermal gradient by means of a spring-magnet mechanism. This unique technology is compared to other thermal-electric energy harvesting technologies to show that these devices have a similar goal of achieving a maximum theoretical efficiency of around 50% relative to Carnot. The first approach towards achieving improved performance relies on the analytical modeling, and experimental verification, of several subsystems stemming from the original design, which include the optimization of the magnetic force component, the optimization of the heat transfer process and the efficiency of the energy conversion process. The method to improve the magnetic force component is not recommended and neither is the method to improve the heat transfer process. Nevertheless, the energy conversion subsystem is successfully modeled and verified; thereby suggesting that an electromagnetic induction coil may be better suited for the energy conversion process over a ferroelectric transduction mechanism at bulk scale. A cascade design is also investigated as a method to improve device efficiency; though analysis reveals a design flaw, which leads to other methods for improving efficiency. Two models of thermomagnetic generator thermodynamic efficiency are developed, which are based on distinct approaches taken by Solomon and Brillouin in order to compare this unique system to a Carnot engine. The model based on a modified form of Solomon's approach results in a relative efficiency of 0.5%, which compares well with an estimate of efficiency based on provided data from the original design. This representative model of efficiency was then applied to a survey of pure elements for comparison, which confirms gadolinium as the best material for use as a working body with a relative efficiency of around 20%. The model based on Brillouin's approach represents a more rigorous thermodynamic analysis, which qualitatively agrees with the results based on Solomon's approach, though it predicts larger values of efficiency for most of the materials in the survey. The conservative model based on Solomon's approach is then applied to a hypothetical system that uses a single-domain magnetic material as a working body. This effort is pursued since single-domain nanostructures exhibit a remanent magnetization, which is shown to increase magnetic energy density. The resulting analysis predicts efficiencies on the order of 30% relative to Carnot for this nanoscale system, though the effects of size are not considered in this model. A model is developed to correlate the effects of size on thermodynamic efficiency for this device. Considering a nanoscaled nickel structure as a working body, this model combines three existing models to predict relative efficiency values that are comparable to the bulk scale, although this system may operate closer to room-temperature. This result is unexpected since the absolute efficiency is shown to increase as a function of decreasing size, though this discrepancy is explained as a consequence of Curie point suppression. The combined model is also applied to a hypothetical composite made of separated layers of nickel with distinct thicknesses. This composite material is predicted to spread the ferromagnetic transition across a much larger temperature range as compared to bulk nickel, such that this material may be better suited for different applications; for example, as a sensor or as a thermal switch. Moreover, this combined model is also shown to be a lower-bound estimate of thermodynamic efficiency, since the actual performance depends on material characterizations that have yet to be determined. The magnetization of ferromagnetic nanostructures as a function of both applied field, and temperature represents a current engineering challenge. This may be due to current manufacturing techniques that produce defects, and may also be due to resolution limitations of commercially available magnetometers. These challenges also affect a proposed hypothesis regarding the existence of a distribution of transition temperatures within a single nanostructure. This hypothesis aims to resolve whether the diffuse transition behavior of ferromagnetic nanostructures is due to volume-averaged magnetometer measurement techniques, and/or due to surface effects from defects resulting from imperfect manufacturing techniques. These issues would need to be resolved before considering a nanoscale design, which may potentially be useful as a secondary energy-recycling device in thermally assisted magnetic recording applications. Nevertheless, a proof-of-concept experimental setup is offered that may be useful for future designs at the smallest relevant scales.

Magnetoelectric Polymer Based Composites

Magnetoelectric Polymer Based Composites Book
Author : Senentxu Lanceros-Méndez,Pedro Martins
Publisher : John Wiley & Sons
Release : 2017-06-21
ISBN : 3527801359
Language : En, Es, Fr & De

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Book Description :

The first book on this topic provides a comprehensive and well-structured overview of the fundamentals, synthesis and emerging applications of magnetoelectric polymer materials. Following an introduction to the basic aspects of polymer based magnetoelectric materials and recent developments, subsequent chapters discuss the various types as well as their synthesis and characterization. There then follows a review of the latest applications, such as memories, sensors and actuators. The book concludes with a look at future technological advances. An essential reference for entrants to the field as well as for experienced researchers.

Investigations on Magnetoelectric Bulk and Nanocomposite Materials

Investigations on Magnetoelectric Bulk and Nanocomposite Materials Book
Author : Austin Mcdannald
Publisher : Unknown
Release : 2016
ISBN : 0987650XXX
Language : En, Es, Fr & De

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Book Description :

Magnetoelectric multiferroics (ME MFs) exhibit both magnetic and ferroelectric orders and show coupling between the two order parameters. These materials have potential for their applications in magnetic field sensors, energy harvesters, and novel spintronic devices. For these applications, ME MFs with strong ME coupling at room temperature are needed. However at present there are no suitable single phase materials for these applications. This dissertation uses the versatility of wet chemistry sol-gel based synthesis methods to explore two methods of improving the ME coupling and furthering the understanding of the operating mechanisms. Historically, single phase ME MFs have weak ME coupling at room temperature. Composites of piezoelectric and magnetostrictive materials achieve ME coupling through strain transfer between the phases. The first pathway toward technologically applicable ME MFs pursued in this dissertation is to develop novel synthesis methods of composites of PbZr0.52Ti0.48O3 and CoFe2O4 that optimize the nanoscale phase distribution and avoid parasitic effects like leakage current to maximize the ME coupling. The discovery of magnetically driven ferroelectricity has renewed interest in single phase ME MFs for spintronic applications. The rare-earth chromites, such as DyCrO3, are good candidates for magnetically driven ferroelectricity at much higher temperatures (~150 K for DyCrO3), than other similar materials. Utilizing the versatility of the sol-gel based synthesis to study the effects of chemical substitutions, the fundamental understanding of the magnetic order and magnetic exchange interactions and how they relate to the electronic properties has been enhanced. These substitutions are shown to cause novel magnetic properties, such as single phase exchange bias, which facilitates novel functionalities. The work in this dissertation improves the ME coupling and understanding of the underlying physical mechanisms in MF MFs to enable future device applications.