Contribution à la réalisation d'un spectromètre de RMN appliqué à la physique des solides (10-400 MHz et 0-17.5 Tesla) PDF Download
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Author: Benkhebbab Mohamed el Moubachar (auteur en physique).)
Publisher:
ISBN:
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Languages : fr
Pages : 0
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Ce travail porte sur la conception d'un spectrometre de rmn dans l'etat solide utilise dans une gamme inhabituelle de champ magnetique (0-17.5 tesla). Apres une discussion des performances et des limites des spectrometres commerciaux disponibles, la description d'un programmateur d'impulsions (25 ns de resolution) et d'un analyseur de transitoire rapide, pilote par un microordinateur est discutee en detail. Le choix du langage de programmation, les problemes lies au transfert de donnees et les limitations qui en decoulent pour une repetition rapide de la sequence de rmn, sont bien discutes; le choix resultant, l'association du langage assembleur et d'asyst offre la possibilite de transformer un logiciel essentiellement monotache en un environnement multitaches et offre a l'experimentateur en rmn du solide les possibilites de traitement du signal dans un environnement de travail ouvert sur un microordinateur. Les performances de ce logiciel sont bien illustrees par des experiences specifiques sur les supraconducteurs a haute temperature
Author: Benkhebbab Mohamed el Moubachar (auteur en physique).)
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0
Get Book Here
Book Description
Ce travail porte sur la conception d'un spectrometre de rmn dans l'etat solide utilise dans une gamme inhabituelle de champ magnetique (0-17.5 tesla). Apres une discussion des performances et des limites des spectrometres commerciaux disponibles, la description d'un programmateur d'impulsions (25 ns de resolution) et d'un analyseur de transitoire rapide, pilote par un microordinateur est discutee en detail. Le choix du langage de programmation, les problemes lies au transfert de donnees et les limitations qui en decoulent pour une repetition rapide de la sequence de rmn, sont bien discutes; le choix resultant, l'association du langage assembleur et d'asyst offre la possibilite de transformer un logiciel essentiellement monotache en un environnement multitaches et offre a l'experimentateur en rmn du solide les possibilites de traitement du signal dans un environnement de travail ouvert sur un microordinateur. Les performances de ce logiciel sont bien illustrees par des experiences specifiques sur les supraconducteurs a haute temperature
Author: T.A. Kaplan
Publisher: Springer Science & Business Media
ISBN: 0306461323
Category : Science
Languages : en
Pages : 299
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Book Description
This series of books, which is published at the rate of about one per year, addresses fundamental problems in materials science. The contents cover a broad range of topics from small clusters of atoms to engineering materials and involves chemistry, physics, materials science and engineering, with length scales ranging from Ångstroms up to millimeters. The emphasis is on basic science rather than on applications. Each book focuses on a single area of current interest and brings together leading experts to give an up to date discussion of their work and the work of others. Each article contains enough references that the interested reader can access the relevant literature. Thanks are given to the Center for Fundamental Materials Research at Michigan State University for supporting this series. M. F. Thorpe, Series Editor E mail: thorpe@pa. msu. edu V PREFACE This book records invited lectures given at the workshop on Physics of Manganites, held at Michigan State University, July 26 29, 1998. Doped manganites are an interesting class of compounds that show both metal insulator and ferromagnetic to paramagnetic transitions at the same temperature. This was discovered in the early 1950s by Jonker and van Santen and basic theoretical ideas were developed by Zener (1951), Anderson and Hasegawa (1955), and deGennes (1960) to explain these transitions and related interesting observations.
Author: Battelle Memorial Institute. Columbus Laboratories
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 80
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Author: P.M. Duxbury
Publisher: Springer Science & Business Media
ISBN: 0306470713
Category : Technology & Engineering
Languages : en
Pages : 248
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Book Description
This series of books, which is published at the rate of about one per year, addresses fundamental problems in materials science. The contents cover a broad range of topics from small clusters of atoms to engineering materials and involve chemistry, physics, and engineering, with length scales ranging from Ångstroms up to millimeters. The emphasis is on basic science rather than on applications. Each book focuses on a single area of current interest and brings together leading experts to give an up-to-date discussion of their work and the work of others. Each article contains enough references that the interested reader can access the relevant literature. Thanks are given to the Center for Fundamental Materials Research at Michigan State University for supporting this series. M. F. Thorpe, Series Editor E-mail: thorpe@pa. msu. edu v PREFACE th th During the period 4 -8 August 1996, a conference with the same title as this book was held in Traverse City, Michigan. That conference was organized as a sequel to an interesting and successful WEM workshop in a similar area run by Profs. Hans Bonzel and Bill Mullins in May 1995. This book contains papers presented at the Traverse City conference. The book focuses on: atomic processes, step structure and dynamics; and their effect on surface and interface structures and on the relaxation kinetics of larger leng- scale nonequilibrium morphologies.
Author: Manfred Fiebig
Publisher: Springer Science & Business Media
ISBN: 1402027079
Category : Science
Languages : en
Pages : 342
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In the quest for higher data density in information technology manipulation of magnetization by other means than magnetic fields has become an important challenge. This lead to a startling revival of the magnetoelectric effect, which characterizes induction of a polarization by a magnetic field or of a magnetization by an electric field. The magnetoelectric crosslink of material properties opens just those degrees of freedom which are needed for the mutual control of magnetic and electric states. The book gives a state-of-the-art review on magnetoelectrics research, classifies current research tendencies, and points out possible future trends. Novel compounds and growth techniques and new theoretical concepts for the understanding of magnetoelectric coupling phenomena are introduced. Highlights are the discovery of "gigantic" magnetoelectric effects which are strong enough to trigger electric or magnetic phase transitions; the concept of magnetochirality; and development "structural" magnetoelectric effects in artificial multiphase compounds. The book is addressed to condensed-matter physicists with a particular focus on experts in highly correlated systems.
Author: Ulrich Sigwart
Publisher: Thieme-Stratton Corporation
ISBN: 9780865771468
Category : Angiocardiography
Languages : en
Pages : 327
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Author: H. Brumberger
Publisher: Springer Science & Business Media
ISBN: 9401584575
Category : Technology & Engineering
Languages : en
Pages : 470
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Proceedings of the NATO Advanced Study Institute, Como, Italy, May 12--22, 1993
Author: I. A. Campbell
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 252
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Author: S.J.L. Billinge
Publisher: Springer Science & Business Media
ISBN: 0306470772
Category : Technology & Engineering
Languages : en
Pages : 397
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Book Description
This series of books, which is published at the rate of about one per year, addresses fundamental problems in materials science. The contents cover a broad range of topics from small clusters of atoms to engineering materials and involve chemistry, physics, materials science and engineering, with length scales ranging from Ångstroms up to millimeters. The emphasis is on basic science rather than on applications. Each book focuses on a single area of current interest and brings together leading experts to give an up-to-date discussion of their work and the work of others. Each article contains enough references that the interested reader can access the relevant literature. Thanks are given to the Center for Fundamental Materials Research at Michigan State University for supporting this series. M.F. Thorpe, Series Editor E-mail: thorpe @ pa.msu.edu East Lansing, Michigan PREFACE One of the most challenging problems in the study of structure is to characterize the atomic short-range order in materials. Long-range order can be determined with a high degree of accuracy by analyzing Bragg peak positions and intensities in data from single crystals or powders. However, information about short-range order is contained in the diffuse scattering intensity. This is difficult to analyze because it is low in absolute intensity (though the integrated intensity may be significant) and widely spread in reciprocal space.
Author: Erik A. Beever
Publisher: CRC Press
ISBN: 1420087223
Category : Nature
Languages : en
Pages : 342
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Book Description
Contemporary climate change is a crucial management challenge for wildlife scientists, conservation biologists, and ecologists of the 21st century. Climate fingerprints are being detected and documented in the responses of hundreds of wildlife species and numerous ecosystems around the world. To mitigate and accommodate the influences of climate ch
