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Elaboration Et Etude Dun Systeme Hybride Oxyde Ferrimagnetique
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Book Synopsis Elaboration et étude d'un système hybride Oxyde ferrimagnétique by :
Download or read book Elaboration et étude d'un système hybride Oxyde ferrimagnétique written by and published by . This book was released on 2004 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail s'inscrit dans les recherches actives des nouvelles propriétés magnétiques et électriques dans les hétérostructures artificielles. Nous avons élaboré et étudié un système du type "oxyde ferrimagnétique / métal non magnétique / oxyde ferrimagnétique" dans lequel les électrons sont confinés dans la couche métallique 2D et subissent de nombreuses réflexions aux interfaces "métal / isolant magnétique". L'élaboration de ce système impose une maîtrise de la croissance des différentes couches et de la planéité des interfaces. Les dépôts sont épitaxiés afin de limiter les diffusions des électrons aux joints de grains par pulvérisation cathodique dans un bâti UHV, les caractérisations structurales sont essentiellement réalisées par microscopie électronique haute résolution et diffraction des rayons X. Nous avons étudié la croissance épitaxiale de couches simples de Fe3O4 et de CoFe2O4 sur Al2O3(0001) et MgO(001) afin d'obtenir respectivement une direction de croissance [111] et [001]. Nous nous sommes également intéressés à la croissance épitaxiale et à l'anisotropie d'échange de bicouches Fe3O4(5nm à 50nm)/NiO(66nm) dans ces deux mêmes directions de croissance. Nous avons ensuite étudié la croissance de métaux non oxydables (Pt, Au et Ag) sur les surfaces (001) et (111) de Fe3O4. Ces résultats ont permis d'élaborer les systèmes épitaxiés Fe3O4 / M(Au, Pt) / CoFe2O4 sur Al2O3(0001). Les propriétés électriques montrent que les électrons sont confinés dans la couche métallique et qu'apparaît une GMR atteignant près de 1,8% à 10K due exclusivement aux réflexions électroniques sur les interfaces métal/oxyde avec une forte contribution des réflexions spéculaires.
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 Multifunctional Oxide Heterostructures by : Evgeny Y. Tsymbal
Download or read book Multifunctional Oxide Heterostructures written by Evgeny Y. Tsymbal and published by OUP Oxford. This book was released on 2012-08-30 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is devoted to the rapidly developing field of oxide thin-films and heterostructures. Oxide materials combined with atomic-scale precision in a heterostructure exhibit an abundance of macroscopic physical properties involving the strong coupling between the electronic, spin, and structural degrees of freedom, and the interplay between magnetism, ferroelectricity, and conductivity. Recent advances in thin-film deposition and characterization techniques made possible the experimental realization of such oxide heterostructures, promising novel functionalities and device concepts. The book consists of chapters on some of the key innovations in the field over recent years, including strongly correlated oxide heterostructures, magnetoelectric coupling and multiferroic materials, thermoelectric phenomena, and two-dimensional electron gases at oxide interfaces. The book covers the core principles, describes experimental approaches to fabricate and characterize oxide heterostructures, demonstrates new functional properties of these materials, and provides an overview of novel applications.
Book Synopsis Data Storage at the Nanoscale by : Gan Fuxi
Download or read book Data Storage at the Nanoscale written by Gan Fuxi and published by CRC Press. This book was released on 2015-02-09 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the big data era, data storage is one of the cores in the whole information chain, which includes production, transfer, sharing, and finally processing. Over the years, the growth of data volume has been explosive. Today, various storage services need memories with higher density and capacity. Moreover, information storage in the big data applic
Book Synopsis Physical Properties of Amorphous Materials by : David Adler
Download or read book Physical Properties of Amorphous Materials written by David Adler and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Institute for Amorphous Studies was founded in 1982 as the international center for the investigation of amorphous mate rials. It has since played an important role in promoting the und er standing of disordered matter in general. An Institute lecture series on "Fundamentals of Amorphous Materials and Devices" was held during 1982-83 with distinguished speakers from universities and industry. These events were free and open to the public ,and were attended by many representatives of the scientific community. The lectures themselves were highly successful inasmuch as they provided not only formal instruction but also an opportunity for vigorous and stimulating debate. That last element could not be captured within the pages of a book I but the lectures concentrated on the latest advances in the field I which is why their essential contents are he re reproduced in collective form. Together they constitute an interdisciplinary status report of the field. The speakers brought many different viewpoints and a variety of back ground experiences io bear on the problems involved I but though language and conventions vary I the essential unity of the concerns is very clear I as indeed are the ultimate benefits of the many-sided approach.
Book Synopsis Forest Fire Research by : Universidade de Coimbra
Download or read book Forest Fire Research written by Universidade de Coimbra and published by . This book was released on 2010 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt:
