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Relaxation Et Magnetisme Des Surfaces Et Interfaces Des Metaux De Transition
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Book Synopsis RELAXATION ET MAGNETISME DES SURFACES ET INTERFACES DES METAUX DE TRANSITION by : BERNARD.. M'PASSI MABIALA
Download or read book RELAXATION ET MAGNETISME DES SURFACES ET INTERFACES DES METAUX DE TRANSITION written by BERNARD.. M'PASSI MABIALA and published by . This book was released on 1996 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: NOUS AVONS DANS LE CADRE DE LA THEORIE DE LA FONCTIONNELLE DE LA DENSITE LOCALE DERIVE RIGOUREUSEMENT UNE EXPRESSION GENERALE DE LA VARIATION DE L'ENERGIE TOTALE D'UN SYSTEME METALLIQUE AU PREMIER ORDRE PAR RAPPORT AUX DEPLACEMENTS ATOMIQUES. NOUS TENONS COMPTE DANS NOTRE MODELE DE TOUTES LES CONTRIBUTIONS A L'ENERGIE NOTAMMENT LES CONTRIBUTIONS DE BANDE, DE COULOMB, D'ECHANGE ET CORRELATION AINSI DES TERMES IONIQUES. L'ETUDE DU MECANISME DE LA RELAXATION DE SURFACE EN LIAISONS FORTES CONDUIT A UN CHANGEMENT DE SIGNE DE LA CONTRIBUTION DES ELECTRONS D AU CHAMP DE FORCES QUAND ON VA DU MILIEU EN FIN DE SERIE. CE CHANGEMENT EST RELIE A L'AUGMENTATION DU TERME REPULSIF DE LA FORCE, QUI DEPEND FORTEMENT DE LA STRUCTURE ELECTRONIQUE AU NIVEAU DE FERMI. NOUS OBTENONS DANS UN SCHEMA CLASSIQUE DES LIAISONS FORTES D UNE RELAXATION VERS L'EXTERIEUR POUR LES SURFACES (001) DE RH, PD ET NI EN ACCORD AVEC LES RESULTATS EXPERIMENTAUX ET UNE CONTRACTION POUR LES SURFACES (001) DU FE ET DU CR PARAMAGNETIQUES. L'ETUDE DES SURFACES (001) DU FE FERROMAGNETIQUE ET DU CR ANTIFERROMAGNETIQUE EN UTILISANT L'HAMILTONIEN DE HUBBARD POUR LA STRUCTURE ELECTRONIQUE CONDUIT A UNE CONTRACTION DE SURFACE ; LES MOMENTS MAGNETIQUES CORRESPONDANTS SONT DEDUITS D'UNE MANIERE AUTOCOHERENTE. ON REMARQUE EN COMPRAISON AVEC L'ETAT NON RELAXE UNE CHUTE DRASTIQUE DU MOMENT MAGNETIQUE A LA SURFACE (001) DU CR ; LA VARIATION DU MOMENT MAGNETIQUE POUR LE FE N'EST PAS SIGNIFICATIVE. L'ETUDE DU MAGNETISME GELE A L'INTERFACE CR/V MONTRE LA FORTE INFLUENCE DE LA FACE CRISTALLOGRAPHIQUE: LES INVESTIGATIONS SUR DES FILMS CR#3V#1 PRESENTENT UN COUPLAGE ANTIFERRO PAR PLAN POUR LES FACES (001), (111) ET ANTIFERRO DANS LE POUR LA FACE (011). L'INFLUENCE DE L'EPAISSEUR DES COUCHES V ADSORBEES EST DISCUTEE
Book Synopsis STRUCTURE ELECTRONIQUE ET MAGNETIQUE DE SURFACES ET D'INTERFACES DE SYSTEMES A BASE DE METAUX DE TRANSITION by : OMAR.. ELMOUHSSINE
Download or read book STRUCTURE ELECTRONIQUE ET MAGNETIQUE DE SURFACES ET D'INTERFACES DE SYSTEMES A BASE DE METAUX DE TRANSITION written by OMAR.. ELMOUHSSINE and published by . This book was released on 1998 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL DE THESE COMPORTE, ESSENTIELLEMENT, UNE ETUDE DES PROPRIETES ELECTRONIQUES ET MAGNETIQUES DE FILMS ULTRAMINCES DE METAUX DE TRANSITION (MT) ADSORBES SUR DIFFERENTS TYPES DE SUBSTRATS. LA STRUCTURE ELECTRONIQUE ET MAGNETIQUE DE SURFACE ET INTERFACE DE CES SYSTEMES METALLIQUES EST DETERMINEE PAR DES CALCULS DE STRUCTURES DE BANDES, TANT SEMI-EMPIRIQUES QUE AB INITIO. LE MANGANESE (MN), ELEMENT 3D DU MILIEU DE LA PREMIERE SERIE DES MT, A PRIS UNE PART IMPORTANTE DANS CE TRAVAIL. CET ELEMENT, CONNU PAR SA COMPLEXITE STRUCTURELLE ET MAGNETIQUE, EST ETUDIE, DANS UN PREMIER TEMPS, DANS UNE STRUCTURE TETRAGONALE CENTREE (BCT) EN VOLUME ET A LA SURFACE (001), PUIS COMME FILM ULTRAMINCE, D'UNE MONOCOUCHE D'EPAISSEUR, DEPOSE SUR DES SUBSTRATS DE FER (FE) ET DE COBALT (CO). DANS LE CAS DES FILMS ULTRAMINCES ADSORBES SUR LE FER ET LE COBALT, PLUSIEURS CONFIGURATIONS MAGNETIQUES SONT ETUDIEES, AFIN DE TIRER PLUS D'INFORMATIONS SUR LA STRUCTURE MAGNETIQUE DU MN A LA LUMIERE DES DONNEES EXPERIMENTALES DISPONIBLES. UNE ETUDE SUR LA RELATION ENTRE LE MAGNETISME ET LA STRUCTURE CRISTALLOGRAPHIQUE D'UNE MONOCOUCHE DE MT (CR, MN, FE) DEPOSEE SUR LA SURFACE (100) DU SUBSTRAT D'ARGENT, EST PRESENTEE DANS LE DERNIER CHAPITRE DE CETTE THESE, ET LES RESULTATS SONT COMPARES A CEUX DES TRAVAUX EXPERIMENTAUX EFFECTUES SUR CES SYSTEMES.
Download or read book Physics Briefs written by and published by . This book was released on 1994 with total page 1248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Canadian Journal of Physics written by and published by . This book was released on 1990 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Essentials of Paleomagnetism by : Lisa Tauxe
Download or read book Essentials of Paleomagnetism written by Lisa Tauxe and published by Univ of California Press. This book was released on 2010-03-19 with total page 505 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book by Lisa Tauxe and others is a marvelous tool for education and research in Paleomagnetism. Many students in the U.S. and around the world will welcome this publication, which was previously only available via the Internet. Professor Tauxe has performed a service for teaching and research that is utterly unique."—Neil D. Opdyke, University of Florida
Book Synopsis Dielectric Phenomena in Solids by : Kwan Chi Kao
Download or read book Dielectric Phenomena in Solids written by Kwan Chi Kao and published by Elsevier. This book was released on 2004-05-11 with total page 601 pages. Available in PDF, EPUB and Kindle. Book excerpt: In general, a dielectric is considered as a non-conducting or insulating material (such as a ceramic or polymer used to manufacture a microelectronic device). This book describes the laws governing all dielectric phenomena. · A unified approach is used in describing each of the dielectric phenomena, with the aim of answering "what?", "how?" and "why" for the occurrence of each phenomenon;· Coverage unavailable in other books on ferroelectrics, piezoelectrics, pyroelectrics, electro-optic processes, and electrets;· Theoretical analyses are general and broadly applicable;· Mathematics is simplified and emphasis is placed on the physical insight of the mechanisms responsible for the phenomena;· Truly comprehensive coverage not available in the current literature.
Book Synopsis Magnetism and Synchrotron Radiation by : Eric Beaurepaire
Download or read book Magnetism and Synchrotron Radiation written by Eric Beaurepaire and published by Springer Science & Business Media. This book was released on 2010-03-12 with total page 435 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in the synthesis of new materials with often complex, nano-scaled structures require increasingly sophisticated experimental techniques that can probe the electronic states, the atomic magnetic moments and the magnetic microstructures responsible for the properties of these materials. At the same time, progress in synchrotron radiation techniques has ensured that these light sources remain a key tool of investigation, e.g. synchrotron radiation sources of the third generation are able to support magnetic imaging on a sub-micrometer scale. With the Fifth Mittelwihr School on Magnetism and Synchrotron Radiation the tradition of teaching the state-of-the-art on modern research developments continues and is expressed through the present set of extensive lectures provided in this volume. While primarily aimed at postgraduate students and newcomers to the field, this volume will also benefit researchers and lecturers actively working in the field.
Book Synopsis The Chemistry of Contrast Agents in Medical Magnetic Resonance Imaging by : Andre S. Merbach
Download or read book The Chemistry of Contrast Agents in Medical Magnetic Resonance Imaging written by Andre S. Merbach and published by John Wiley & Sons. This book was released on 2013-02-19 with total page 514 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Resonance Imaging (MRI) is one of the most important tools in clinical diagnostics and biomedical research. The number of MRI scanners operating around the world is estimated to be approximately 20,000, and the development of contrast agents, currently used in about a third of the 50 million clinical MRI examinations performed every year, has largely contributed to this significant achievement. This completely revised and extended second edition: Includes new chapters on targeted, responsive, PARACEST and nanoparticle MRI contrast agents. Covers the basic chemistries, MR physics and the most important techniques used by chemists in the characterization of MRI agents from every angle from synthesis to safety considerations. Is written for all of those involved in the development and application of contrast agents in MRI. Presented in colour, it provides readers with true representation and easy interpretation of the images. A word from the Authors: Twelve years after the first edition published, we are convinced that the chemistry of MRI agents has a bright future. By assembling all important information on the design principles and functioning of magnetic resonance imaging probes, this book intends to be a useful tool for both experts and newcomers in the field. We hope that it helps inspire further work in order to create more efficient and specific imaging probes that will allow materializing the dream of seeing even deeper and better inside the living organisms. Reviews of the First Edition: "...attempts, for the first time, to review the whole spectrum of involved chemical disciplines in this technique..."—Journal of the American Chemical Society "...well balanced in its scope and attention to detail...a valuable addition to the library of MR scientists..."—NMR in Biomedicine
Book Synopsis Modern Trends in Magnetostriction Study and Application by : M.R.J. Gibbs
Download or read book Modern Trends in Magnetostriction Study and Application written by M.R.J. Gibbs and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: An understanding of magnetostriction is important for a range of technologically and scientifically important materials. The book covers bulk and thin film magnetostrictive materials, superconductors and oxides. The role of magnetostriction in determining or influencing the physical properties is discussed in depth and wide-ranging reference lists are provided for further study. Contributors have provided both tutorial material and discussions of leading-edge science. Readership: An invaluable reference for all condensed matter physicists, material scientists and technologists for whom bulk or thin film magnetic materials or superconductors are central to their interests.
Book Synopsis Materials and Surface Engineering in Tribology by : Jamal Takadoum
Download or read book Materials and Surface Engineering in Tribology written by Jamal Takadoum and published by John Wiley & Sons. This book was released on 2013-05-10 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title is designed to provide a clear and comprehensive overview of tribology. The book introduces the notion of a surface in tribology where a solid surface is described from topographical, structural, mechanical, and energetic perspectives. It also describes the principal techniques used to characterize and analyze surfaces. The title then discusses what may be called the fundamentals of tribology by introducing and describing the concepts of adhesion, friction, wear, and lubrication. The book focuses on the materials used in tribology, introducing the major classes of materials used, either in their bulk states or as coatings, including both protective layers and other coatings used for decorative purposes. Of especial importance to the tribology community are sections that provide the latest information on Nanotribology, Wear, Lubrication, and Wear-Corrosion: Tribocorrosion and Erosion-Corrosion.
Book Synopsis Magnetic Nanoparticles in Biosensing and Medicine by : Nicholas J. Darton
Download or read book Magnetic Nanoparticles in Biosensing and Medicine written by Nicholas J. Darton and published by Cambridge University Press. This book was released on 2019-02-14 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drawing together topics from a wide range of disciplines, and featuring up-to-date examples of clinical usage and research applications, this text provides a comprehensive insight into the fundamentals of magnetic biosensors and the applications of magnetic nanoparticles in medicine.
Book Synopsis International Conference on the Applications of the Mössbauer Effect, Kyoto, August 28-September 1, 1978 by : International Union of Pure and Applied Chemistry
Download or read book International Conference on the Applications of the Mössbauer Effect, Kyoto, August 28-September 1, 1978 written by International Union of Pure and Applied Chemistry and published by EDP Sciences. This book was released on 1979 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book INIS Atomindex written by and published by . This book was released on 1988 with total page 1308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Magnetism and Atomic Structure by : Edmund Clifton Stoner
Download or read book Magnetism and Atomic Structure written by Edmund Clifton Stoner and published by . This book was released on 1926 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Programs written by and published by . This book was released on 1975 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nanoporous Alumina written by Dusan Losic and published by Springer. This book was released on 2015-07-17 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives detailed information about the fabrication, properties and applications of nanoporous alumina. Nanoporous anodic alumina prepared by low-cost, simple and scalable electrochemical anodization process due to its unique structure and properties have attracted several thousand publications across many disciplines including nanotechnology, materials science, engineering, optics, electronics and medicine. The book incorporates several themes starting from the understanding fundamental principles of the formation nanopores and theoretical models of the pore growth. The book then focuses on describing soft and hard modification techniques for surface and structural modification of pore structures to tailor specific sensing, transport and optical properties of nano porous alumina required for diverse applications. These broad applications including optical biosensing, electrochemical DNA biosensing, molecular separation, optofluidics and drug delivery are reviewed in separated book chapters. The book appeals to researchers, industry professionals and high-level students.
