Download or read book ETUDE DES PROPRIETES STRUCTURALES ET MAGNETIQUES DE FILMS MINCES DE CR CO PD 111 written by SAMY.. BOUKARI and published by . This book was released on 1998 with total page 159 pages. Available in PDF, EPUB and Kindle. Book excerpt: CETTE THESE EST CONSACREE A L'ETUDE DE LA CROISSANCE, DE LA STRUCTURE ET DES PROPRIETES MAGNETIQUES DE L'INTERFACE CR/CO, LE COBALT ETANT EPITAXIE SUR UN MONOCRISTAL DE PD(111). L'ETUDE DE LA CROISSANCE ET DE LA STRUCTURE A ETE CONDUITE SOUS ULTRAVIDE PAR DIFFRACTIONS D'ELECTRONS LENTS, DIFFRACTION DE RAYONS X EN INCIDENCE RASANTE ET SPECTROSCOPIE AUGER. LES MESURES MAGNETIQUES ONT ETE REALISEES PAR EFFET KERR MAGNETO-OPTIQUE IN SITU. CONCERNANT LES DEPOTS DE CO/PD(111), J'AI MONTRE QUE LA CROISSANCE A 293 K DU CO SE FAIT PAR ILOTS BICOUCHES JUSQU'A UNE MONOCOUCHE DEPOSEE, PUIS EN MULTICOUCHES SIMULTANEES. LA STRUCTURE EST MAJORITAIREMENT CFC MACLEE. LES FILMS ONT ETE RECUITS JUSQU'A 470 K CE QUI PROVOQUE LE LISSAGE DE LA SURFACE, FAIT APPARAITRE LA PHASE HCP DU CO, ET ENTRAINE UNE FAIBLE INTERDIFFUSION. LE DEPOT DE CO A 370 K STABILISE LA PHASE HCP SANS INTERDIFFUSION ET SANS SEGREGATION DE PD. QUELLES QUE SOIENT LES CONDITIONS DE PREPARATION CONSIDEREES, IL EST POSSIBLE DE MODULER L'ETAT DE CONTRAINTE DU FILM EN CHANGEANT SON EPAISSEUR. LA CROISSANCE DU CR SUR LES FILMS EPITAXIES DE CO/PD(111) PROCEDE PAR ILOTS SANS INTERDIFFUSION. LES RELATIONS D'EPITAXIE ENTRE LE CR ET LE CO DEPENDENT DE L'ETAT DE CONTRAINTE DU CO : LE CR ADOPTE L'ORIENTATION KURDJUMOV-SACHS SUR LES FILMS DE CO LES PLUS CONTRAINTS, ET L'ORIENTATION NISHIYAMA-WASSERMANN SUR LES FILMS PLUS EPAIS, MOINS CONTRAINTS. LA COUVERTURE DE CR PROVOQUE UNE TRANSITION DU CO CFC EN CO HCP. LA DESCRIPTION STRUCTURALE DETAILLEE PERMET DE CORRELER QUALITATIVEMENT LES PROPRIETES MAGNETIQUES A L'ETAT DES CONTRAINTES, A LA STRUCTURE, A LA SEGREGATION DE PD ET A L'INTERDIFFUSION. L'ANALYSE QUANTITATIVE DE L'ANISOTROPIE MAGNETIQUE D'UN FILM DE CO DEPOSE A 370 K ET RECOUVERT DE CR MONTRE L'IMPORTANCE PRIMORDIALE DES EFFETS MAGNETO-ELASTIQUES DANS CE SYSTEME, ET SUGGERE UNE ANISOTROPIE MAGNETOCRISTALLINE D'INTERFACE NEGATIVE ENTRE LE CR ET LE CO.
Download or read book PROPRIETES STRUCTURALES ET MAGNETIQUES DES COUCHES EPITAXIALES DE W FE W ET GD FE ELABOREES PAR DEPOT PAR LASER PULSE written by ORAN.. MCGRATH and published by . This book was released on 1994 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE BUT DE CETTE THESE EST D'ETUDIER LES PROPRIETES STRUCTURALES ET MAGNETIQUES DES COUCHES EPITAXIEES DE W/FE/W ET GD/FE ELABOREES PAR DEPOT LASER PULSE. LA TECHNIQUE DE DEPOT LASER PULSE EST PRESENTEE DANS LE PREMIER CHAPITRE. LA CROISSANCE DES COUCHES MINCES EST DISCUTEE DANS LE DEUXIEME CHAPITRE PUIS L'ANALYSE DES PROPRIETES STRUCTURALES DES COUCHES ELABOREES EST PRESENTEE DANS LE TROISIEME CHAPITRE. UNE REVUE DES PROPRIETES MAGNETIQUES DES COUCHES ULTRA-MINCES, TELLE QUE LE MOMENT MAGNETIQUE, L'ANISOTROPIE ET LES EXCITATIONS THERMIQUES EST PRESENTEE DANS LE QUATRIEME CHAPITRE. LA DETERMINATION EXPERIMENTALE DE CES PROPRIETES MAGNETIQUES DANS LES COUCHES DE W/FE/W EST DISCUTEE DANS LE CINQUIEME CHAPITRE. LE COUPLAGE INTERFACIAL DANS LES COUCHES DE GD/FE EST ANALYSE DANS LE DERNIER CHAPITRE
Download or read book N Heterocyclic Carbenes written by Silvia Diez-Gonzalez and published by Royal Society of Chemistry. This book was released on 2016-11-04 with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt: In less than 20 years N-heterocyclic carbenes (NHCs) have become well-established ancillary ligands for the preparation of transition metal-based catalysts. This is mainly due to the fact that NHCs tend to bind strongly to metal centres, avoiding the need of excess ligand in catalytic reactions. Also, NHC‒metal complexes are often insensitive to air and moisture, and have proven remarkably resistant to oxidation. This book showcases the wide variety of applications of NHCs in different chemistry fields beyond being simple phosphine mimics. This second edition has been updated throughout, and now includes a new chapter on NHC‒main group element complexes. It covers the synthesis of NHC ligands and their corresponding metal complexes, as well as their bonding and stereoelectronic properties and applications in catalysis. This is complemented by related topics such as organocatalysis and biologically active complexes. Written for organic and inorganic chemists, this book is ideal for postgraduates, researchers and industrialists.
Download or read book Pandex Current Index to Scientific and Technical Literature written by and published by . This book was released on 1969 with total page 1286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phosphorus Compounds written by Maurizio Peruzzini and published by Springer Science & Business Media. This book was released on 2011-06-10 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: Each chapter of Phosphorus Compounds: Advanced Tools in Catalysis and Material Sciences have been carefully selected by the editors in order to represent a state-of-the-art overview of how phosphorus chemistry can provide solutions in various fields of applications. The editors have assembled an international array of world-renowned scientists and each chapter is written by experts in the fields of synthetic chemistry, homogeneous catalysis, dendrimers, theoretical calculations, materials science, and medicinal chemistry with a special focus on the chemistry of phosphorus compounds. Phosphorus Compounds: Advanced Tools in Catalysis and Material Sciences is of interest to a general readership ranging from advanced university course students to experts in academia and industry.
Download or read book Magnetism and Superconductivity written by Laurent-Patrick Levy and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: This up-to-date work presents a modern vision of magnetism and superconductivity covering both microscopic and phenomenological aspects. The basic information is illustrated with the help of current research topics such as the quantum Hall effect or mesoscopic aspects of superconductivity.
Download or read book The Boundaries of the West African Craton written by Nasser Ennih and published by Geological Society of London. This book was released on 2008 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Proceedings of the First International Congress of Radiation Protection written by and published by . This book was released on 1968 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guide to Nuclear Power Cost Evaluation Equipment costs written by Kaiser Engineers and published by . This book was released on 1962 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Magic Bullets to Conquer Malaria written by Irwin W. Sherman and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A clear, concise discourse of 300 years of malarial drug research. Serves as a resource for microbiologists, parasitologists, pharmacologists, medicinal chemists, biochemists, physicians, and drug researchers.
Download or read book Quaternary Vegetation Dynamics written by Jürgen Runge and published by CRC Press. This book was released on 2021-11-28 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book celebrates the relaunch of the African Pollen Database, presents state-of-the-art of modern and ancient pollen data from sub-Saharan Africa, and promotes Open Access science. Pollen grains are powerful tools for the study of past vegetation dynamics because they preserve well within sedimentary deposits and have a huge diversity in ornamentation that allows different taxa to be determined. The reconstruction of past vegetation from the examination of ancient pollen records thus can be used to characterize the nature of past landscapes (e.g. abundance of forests vs. grasslands), provide insights into changes in biodiversity, and gain empirical evidence of vegetation response to climatic change and human activity. In this, the 35th Volume of "Palaeoecology of Africa", we bring together new data and extensive synthetic reviews to provide novel insights into the relationships between human evolution, human activity, climate change and vegetation dynamics during the Quaternary, the last 2.6 million years. Current and ongoing climate and land-use change is exerting pressure on modern vegetation formations and threatening the livelihoods and wellbeing of many peoples in Africa. In this book the focus is on the Quaternary because it is during this geological period that the modern vegetation formations developed into their current configurations against a backdrop of high magnitude global climate change (glacial-interglacial cycles), human evolution, and a growing human land-use footprint. In this book the latest information is presented and collated from around the African continent to parameterize past vegetation states, identify the drivers of vegetation change, and assess the vegetation resilience to change. To achieve this research from two broad themes are covered: (i) the present is the key to the past (i.e. studies which improve our understanding of modern environments so that we can better interpret evidence from the past), and (ii) the past is the key to the future (i.e. studies which unlock information on how and why vegetation changed in the past so one can better anticipate trajectories of future change). This Open Access book will provide a strong foundation for future research exploring past ecological, environmental and climatic change within Africa and the surrounding islands. The book is organized regionally (covering western, eastern, central, and southern Africa) and it contains specialized articles focused on particular topics (such as modern pollen-vegetation relationships and fire as a driver of vegetation change), as well as regional and pan-African syntheses drawing together decades of research to assess key scientific questions (including the role of climate in driving vegetation change and the role of vegetation change in human evolution). These articles will be useful to students and teachers from high school to the highest level of university who are interested in the origins and dynamics of vegetation in Africa. Furthermore, it is also meant to provide societally relevant information that can act as an inspiration for the development of sustainable management practices for the future.
Download or read book Black Bass Diversity written by Michael D. Tringali and published by . This book was released on 2015 with total page 685 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
Download or read book Electrical Properties of Solids written by T. F. Connolly and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 1963 the Research Materials Information Center has been answering inquiries on the availability, preparation, and properties of ultrapure inorganic research specimens. It has been possible to do this with reasonable efficiency by searching an automated coded microfilm collection of the report and open literature and of data sheets and question naires provided by commercial and research producers of pure materials. With the growth of the collection to over 70,000 documents and the increase in the demand for more general background information, it has been necessary to compile bibliographies on an increasing variety of subjects. These have been used as indexes to the microfilmed documents for more efficient searching, and in the past distributed in response to individual requests. However, their size and number no longer permit so casual and uneconomic a method of distribution. The "ORNL Solid State Physics Literature Guides" is a practical alternative. Organization The subject organization of the bibliography is given by the Table of Contents. Each section is preceded by a collection of reviews, bibliographies, and "general" papers (i.e., those dealing with methods or equipment rather than single materials, or with such a wide variety of materials that no subsection was appropriate). Coverage is generally from 1960 to mid-1970. Emphasis is on inorganic materials.
Download or read book Methods of Study in Quantitative Soil Ecology Population Production and Energy Flow written by John Phillipson and published by Blackwell Scientific Publications Limited. This book was released on 1971 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: The soil and its total metabolism. Plant roots. Plant litter. Heterotrophic microflora. Protozoa. Nematodes. Enchytraeids. Earthworms. Molluscs. A comparison of extraction methods for terrestrial anthropods. Mites. Apterygotes, pauropods and symphylans. Aphids. Ants and termites. Other arthropods.
