Download or read book Electronic and magnetic properties of bulk gadolinium and iron thin films written by Albert Ballard Andrews and published by . This book was released on 1992 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thin Films Based on Gadolinium Applied to the Magnetic Refrigeration written by Asmaa Endichi and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The search for materials with a giant magnetocaloric effect in a massive state and at a temperature close to ambient temperature is of great interest and is mainly obtained by varying the composition of the materials. However, the first-order transition in these materials exhibits considerable thermal hysteresis, making them difficult to handle in applications for refrigerators operating cyclically. Much effort has been made in recent years to reduce this hysteresis, but the performance obtained with these massive materials does not meet the requirements of efficient magnetic refrigeration. Magnetocaloric materials have been largely unexplored on the nanoscale. However, nanostructuring is a well-known and used approach to disrupt the developed structure-property relationships, hence the interest in manufacturing new nanoscale materials. This will improve their magnetic and magnetocaloric characteristics by varying the size and shape. On the other hand, the magnetocaloric effect in magnetic thin layers is particularly interesting for micro-refrigeration. It is therefore important to study the magnetocaloric properties of materials in the form of thin layers in order to eliminate thermal hysteresis. In this sense, few studies have been done to show the potential of thin film materials for magnetic refrigeration and magnetic properties (saturation magnetization, variation of magnetic entropy and relative cooling ratio ...) measured so far limited remains. In this thesis project, we studied metallic gadolinium, which is the preferred choice as a magnetic refrigerant for most prototypes of active magnetic regenerator (AMR) in the form of a thin layer. The magnetocaloric (MCE) and electrocaloric (ECE) properties of the manufactured gadolinium films (Si / Ta / Gd (100 nm) / Pt (3nm)) are measured, in order to obtain more information on the physics behind the interesting electronic and magnetic properties of this material we demonstrate the magneto-caloric effect of the thin film Gd by measuring the electrical transport of the resistance. Thus, during this thesis, the electrical and especially magnetic behaviors of LaCr2Si2C and multiferroics TbMn2O5 are described using the ab-initio method, in order to broaden our understanding of the electronic, magnetic and therefore magnetocaloric characteristics of these compounds based on rare earth. The development of thin layers for magnetic refrigeration was carried out in the materials science research laboratory with the nanomagnetism and spin electronics team at the Jean Lamour Institute in Nancy and the theoretical calculations are made in the material laboratory condensed and interdisciplinary sciences at the Faculty of Sciences of Rabat.

Download or read book The Faraday Rotation and Some Magnetic Properties of Evaporated Thin Films of Iron Nickel Cobalt and Gadolinium written by Frederick J. McClung (Jr) and published by . This book was released on 1961 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Gas Occlusions and Strains on the Magnetic Properties of Thin Permalloy Films written by B. J. Nicholson and published by . This book was released on 1965 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report comprises a selective survey of the present knowledge of the effects of occluded gases and strains on the magnetic properties of Permalloy films, particularlly those which have significance for computer switching applications. Other possible techniques for accomplishing future computer switching functions and magnetic film properties are reviewed. Bulk properties are described and compared with corresponding thin film properties. The magnetic properties of epitaxial Permalloy, epitaxial nickel, epitaxial iron, polycrystalline nickel, and polycrystalline iron films are discussed. The effects of various occluded gases on magnetic film properties are summarized. Stresses present in evaporated films and their significance in determining the magnetic properties of thin films are considered. A selected bibliography of 548 references is included. (Author).

Download or read book Some Electric and Magnetic Properties of Thin Films of Iron written by Stephen John Raeburn and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Zero Field Magnetic Properties of Gadolinium Terbium and Samarium written by Emma Daniels Hill and published by . This book was released on 1960 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electrical and Magnetic Properties of Gadolinium written by Christopher J. Sutton and published by . This book was released on 1968 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Electric and magnetic properties of thin metallic payers written by and published by . This book was released on 1961 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Structure and Magnetic Properties of Gadolinium silver Vapour Quenched Alloy Films written by Douglas David Jenkins and published by . This book was released on 1976 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Amorphous Magnetism and Metallic Magnetic Materials Digest written by A.R. Ferchmin and published by Elsevier. This book was released on 1983-09-01 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book provides the reader with the only comprehensive overview of the subject. It is an indispensable reference source in that it attempts to compress into one single volume the whole body of basic and applied research on amorphous magnetic metallic materials.Supplements to the Journal of Magnetism and Magnetic Materials appear regularly keeping the information contained in this book as up-to-date as possible. The book has been designed for easy use and is a must for researchers in the field.

Download or read book Magnetic Properties of Two dimensional Thin Films written by Hyuk Jae Choi and published by . This book was released on 2001 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Survey of Magnetic Thin Film Materials written by George William Reimherr and published by . This book was released on 1964 with total page 64 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 1990 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ferromagnetic and Multiferroic Thin Films Aimed Towards Optoelectronic and Spintronic Applications written by Tahir Zaidi and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This work targeted the growth of gadolinium (Gd)-doped gallium nitride (GaN) thin films (Ga2́12́)2́3Gd2́3N) by metal organic chemical vapor deposition (MOCVD). Characterization and evaluation of these Ga2́12́)2́3Gd2́3N thin films for application in spintronics/optoelectronics devices also formed part of this work. This work presents: (1) the first report of stable, reproducible n- and p-type Ga2́12́)2́3Gd2́3N thin films by MOCVD; (2) the first Ga2́12́)2́3Gd2́3N p-n diode structure; and (3) the first report of a room temperature spin-polarized LED using a Ga2́12́)2́3Gd2́3N spin injection layer. The Ga2́12́)2́3Gd2́3N thin films grown in this work were electrically conductive, and co-doping them with Silicon (Si) or Magnesium (Mg) resulted in n-type and p-type materials, respectively. All the materials and structures grown in this work, including the Ga2́12́)2́3Gd2́3N-based p-n diode and spin polarized LED, were characterized for their structural, optical, electrical and magnetic properties. The spin-polarized LED gave spin polarization ratio of 22% and systematic variation of this ratio at room temperature with external magnetic field was observed.

Download or read book Metals Abstracts written by and published by . This book was released on 1996 with total page 1628 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Constitution and Magnetic Properties of Iron cobalt Based Alloys Containing Gadolinium and Terbium written by Shabbar Atiq and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1991 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: