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Synthese Et Caracterisations De Materiaux A Proprietes Magneto Electriques
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Book Synopsis Synthèse et caractérisations de matériaux à propriétés magnéto-électriques by : Pascaline Patureau
Download or read book Synthèse et caractérisations de matériaux à propriétés magnéto-électriques written by Pascaline Patureau and published by . This book was released on 2015 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cette thèse est centrée sur l’étude du matériau multiferroïque de type II MnWO4. L’arrangement en hélice des spins des ions Mn2+ dans le domaine de température compris entre 8 et 12.3 K induit, à l’échelle micrométrique, un ordre ferroélectrique. Afin d’apporter des éléments de compréhension du couplage magnétique-diélectrique et une meilleure connaissance de la relation structure-propriétés, nous avons défini deux axes de recherche. Le premier est la substitution de l’ion Mn2+ par l’ion à effet Jahn-Teller Cu2+. L’existence d’une solution solide Mn1-xCuxWO4 pour 0 ≤ x ≤ 1 avec un changement de phase cristalline pour x ≈ 0.3 a été démontrée. Les mesures de susceptibilités magnétiques et diélectriques ont mises en évidence la conservation des propriétés multiferroïques au sein des matériaux pour x
Book Synopsis Synthèse, caractérisation et mise en forme de matériaux moléculaires magnétiques by : Pauline Grondin
Download or read book Synthèse, caractérisation et mise en forme de matériaux moléculaires magnétiques written by Pauline Grondin and published by . This book was released on 2007 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Certains composés à conversion de spin, en particulier une famille de composés unidimensionnels de type [Fe II (Pi en exposant)3]A2(exposant) ont été proposés comme potentiels matériaux moléculaires pour le stockage de l'information ou comme composants de systèmes optiques. Leurs propriétés couplées de conversion de spin thermique et thermochromisme ont permis de développer des prototypes utilisant ces matériaux sans aboutir à une application industrielle. Un des principaux problèmes étant la mise en forme de ces systemes magnéto-optiques, nous nous sommes orientés vers l'élaboration de nouveaux matériaux hybrides. En fonctionnalisant les groupements triazoles de composés [M II(Pie en exposant)(triazole)3]A2, nous avons obtenu des matériaux possédant des propriétés de cristaux liquides ou de gélifiant de solvants. Dans le cadre de cette thèse, nous nous sommes intéressés aux propriétés physico-chimiques de ces cristaux liquides et de ces gels magnétiques.
Book Synopsis Caractérisation et modélisation des matériaux magnétiques pour les dispositifs de conversion électromagnétique de l'énergie by : Abdelkader Benabou
Download or read book Caractérisation et modélisation des matériaux magnétiques pour les dispositifs de conversion électromagnétique de l'énergie written by Abdelkader Benabou and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les performances des dispositifs de conversion électromagnétique de l'énergie reposent en grande partie sur les propriétés des matériaux ferromagnétiques qui les constituent. Dans un contexte d'efficacité énergétique croissante, il devient alors primordial de disposer d'outils, notamment numériques, fiables et précis pour la conception de ces dispositifs. La bonne connaissance et la représentation réaliste du comportement des matériaux magnétiques permettent de contribuer à cet objectif. Ainsi, les travaux présentés s'inscrivent dans une démarche complète de la chaîne de modélisation d'un dispositif de conversion électrique, allant de la caractérisation expérimentale du matériau magnétique et sa modélisation jusqu'à l'implémentation du modèle dans un outil de calcul par éléments finis et la validation expérimentale sur des dispositifs réels. La synthèse de ces travaux de recherche s'articule autour de trois axes: la caractérisation des matériaux magnétiques, leur modélisation et leur exploitation/validation sur des dispositifs réels. Le premier axe traite principalement des techniques de caractérisation spécifiques développées pour extraire les informations sur les propriétés électromagnétiques des matériaux. Le second axe s'intéresse quant à lui aux modèles de matériaux (hystérésis magnétique, pertes fer, approche probabiliste ...) et à l'implémentation de ces modèles dans un outil de modélisation numérique par éléments finis. Enfin, le troisième axe concerne la validation de ces modèles sur des cas concrets de dispositifs de conversion d'énergie.
Book Synopsis Etude des propriétés magnétiques des matériaux à bases des métaux de transition sous forme de poudre (AúBO¤) et monocristaux (RMX¥) by : Fatma Issaoui
Download or read book Etude des propriétés magnétiques des matériaux à bases des métaux de transition sous forme de poudre (AúBO¤) et monocristaux (RMX¥) written by Fatma Issaoui and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le manuscrit présente des travaux relatifs à la caractérisation structurale, électrique et magnétique des matériaux manganites poly-cristallin, les manganites qui présentent un intérêt industriel croissant compte tenu de ses nombreux domaines d'application et sa complexité du point de vu fondamentale; ces matériaux sont des systèmes dont les électrons sont fortement corrélés par la présence de plusieurs interactions en compétition. Les principaux objectifs de la thèse étaient de mieux comprendre l'effet de la substitution aléatoire sur le site A de la structure double pérovskite (famille Ruddlesden - Popper A2MnO4 dérivée de pérovskite AMnO3), principalement sur les propriétés magnétique. Cette étude a été effectuée sur toute la gamme de température, étude des phénomènes critique au pont de transition et l'étude de la susceptibilité magnétique a haut température. Enfin, une étude d'autres matériaux présentant des propriétés cristallographiques et physique très intéressantes de type RMX5. Les résultats ainsi obtenu permettent des progrès significatifs dans la compréhension de ces matériaux.
Book Synopsis Recherches sur les propriétés des courants magnéto-électriques by : Auguste de La Rive
Download or read book Recherches sur les propriétés des courants magnéto-électriques written by Auguste de La Rive and published by . This book was released on 1838 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthèse, structures et propriétés physiques de matériaux moléculaires conducteurs et magnétiques by : Fatima Setifi
Download or read book Synthèse, structures et propriétés physiques de matériaux moléculaires conducteurs et magnétiques written by Fatima Setifi and published by . This book was released on 2003 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail concerne la synthèse, les études structurales par diffraction des rayons X et l'étude des propriétés électriques et magnétiques de matériaux moléculaires à propriétés multiples, associant en particulier conductivité électrique et interactions magnétiques. Ces composés sont formés de donneurs organiques dérivés du tétrathiafulvalène (TTF) ou du tétrathiapentalène (TTP) et de complexes anioniques d'ions de transition. Afin d'établir des interactions entre les électrons mobiles de la partie organique conductrice et les spins localisés de la partie inorganique paramagnétique, trois types de stratégies sont étudiés (i) l'utilisation de donneurs fonctionnalisés, (ii) l'utilisation d'anion dont les ligands possèdent des systèmes pi et (iii) la synthèse de nouveaux complexes de coordination où les systèmes conducteurs et magnétiques sont liés par un pont conjugué.
Download or read book Bibliography written by Pierre Villars and published by Walter de Gruyter. This book was released on 2012-12-21 with total page 1827 pages. Available in PDF, EPUB and Kindle. Book excerpt: By browsing about 10 000 000 scientific articles of over 200 major journals mainly in a 'cover to cover approach' some 200 000 publications were selected. The extracted data is part of the following fundamental material research fields: crystal structures (S), phase diagrams (also called constitution) (C) and the comprehensive field of intrinsic physical properties (P). This work has been done systematically starting with the literature going back to 1900. The above mentioned research field codes (S, C, P) as well as the chemical systems investigated in each publication were included in the present work. The aim of the Inorganic Substances Bibliography is to provide researchers with a comprehensive compilation of all up to now published scientific publications on inorganic systems in only three handy volumes.
Book Synopsis Matériaux magnétiques : progrès et perspectives by :
Download or read book Matériaux magnétiques : progrès et perspectives written by and published by . This book was released on 1992 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal de Physique written by and published by . This book was released on 1991 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Book Synopsis Flexoelectricity in Liquid Crystals by : Agnes Buka
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Book Synopsis Properties of Lithium Niobate by : Institution of Electrical Engineers
Download or read book Properties of Lithium Niobate written by Institution of Electrical Engineers and published by IET. This book was released on 2002 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of lithium niobate in signal filtering in TV sets and video cassette recorders is well established and it is finding increased application in optoelectronic modulation devices in DWDM (dense wavelength division multiplexing) fibre optic systems. This fully illustrated volume brings electronic engineers, materials scientists and physicists up to date by enlisting the expertise of active researchers and presenting their considered reviews.
Book Synopsis Smart Energy Empowerment in Smart and Resilient Cities by : Mustapha Hatti
Download or read book Smart Energy Empowerment in Smart and Resilient Cities written by Mustapha Hatti and published by Springer Nature. This book was released on 2019-12-24 with total page 703 pages. Available in PDF, EPUB and Kindle. Book excerpt: International Conference on Artificial Intelligence in Renewable Energetic Systems, IC-AIRES2019, 26-28 November 2019, Taghit-Bechar, Algeria. The challenges of the energy transition in the medium term lead to numerous technological breakthroughs in the areas of production, optimal distribution and the rational use of energy and renewable energy (energy efficiency and optimization of consumption, massive electrification, monitoring and control energy systems, cogeneration and energy recovery processes, new and renewable energies, etc.). The fall in the cost of renewable energies and the desire for a local control of energy production are today calling for a profound change in the electricity system. Local authorities are at the center of energy developments by taking into account the local nature of certain energy systems, heat networks, geothermal energy, waste heat recovery, and electricity generation from household waste. On the other side, digital sciences are at the heart of connected objects and intelligent products that combine information processing and communication capabilities with their environment. Digital technology is at the center of new systems engineering approaches (3D modeling, virtualization, simulation, digital prototyping, etc.) for the design and development of intelligent systems. The book deals with various topics ranging from the design, development and maintenance of energy production systems, transport, distribution or storage of energy, optimization of energy efficiency, especially in the use of energy. innovation in the fields of energy production from renewable energies, management of energy networks: electricity, fluids, gas, district heating, energy storage modes: battery, super-capacitors , overseeing energy supply through supervision, control and diagnosis, risk management, as well as the design and management of smart grids: microgrid, smartgrid. This imposes the model of energy empowerment in the advent of smart cities. Empower the world’s most vulnerable energy-poor citizens and establish growing and vibrant socioeconomic communities, by academics, students in engineering and data computing from around the world who have chosen an academic path leading to an electric power and energy engineering and artificial intelligence to advancing technology for the advantage of humanity.
Download or read book Canadiana written by and published by . This book was released on 1989 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1993 with total page 1452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ferroelectric Thin Films by : Carlos Paz de Araujo
Download or read book Ferroelectric Thin Films written by Carlos Paz de Araujo and published by Taylor & Francis. This book was released on 1996 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: The impetus for the rapid development of thin film technology, relative to that of bulk materials, is its application to a variety of microelectronic products. Many of the characteristics of thin film ferroelectric materials are utilized in the development of these products - namely, their nonvolatile memory and piezoelectric, pyroelectric, and electro-optic properties. It is befitting, therefore, that the first of a set of three complementary books with the general title Integrated Ferroelectric Devices and Technologies focuses on the synthesis of thin film ferroelectric materials and their basic properties. Because it is a basic introduction to the chemistry, materials science, processing, and physics of the materials from which integrated ferroelectrics are made, newcomers to this field as well as veterans will find this book self-contained and invaluable in acquiring the diverse elements requisite to success in their work in this area. It is directed at electronic engineers and physicists as well as process and system engineers, ceramicists, and chemists involved in the research, design, development, manufacturing, and utilization of thin film ferroelectric materials.
Book Synopsis Piezoelectric Materials: Advances in Science, Technology and Applications by : Carmen Galassi
Download or read book Piezoelectric Materials: Advances in Science, Technology and Applications written by Carmen Galassi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Research Workshop, Predeal, Romania, 24-27 May, 1999
