Author: Chrissy EmenyPublisher:
ISBN:
Category : Alloys
Languages : en
Pages : 97
Book Description
Pulsed Laser Deposition Growth of Heusler Half-metallic Thin Films
Author: Chrissy EmenyPulsed Laser Deposition of Thin Films
Author: Robert EasonPublisher: John Wiley & Sons
ISBN: 0470052112
Category : Science
Languages : en
Pages : 754
Book Description
Edited by major contributors to the field, this text summarizes current or newly emerging pulsed laser deposition application areas. It spans the field of optical devices, electronic materials, sensors and actuators, biomaterials, and organic polymers. Every scientist, technologist and development engineer who has a need to grow and pattern, to apply and use thin film materials will regard this book as a must-have resource.
The Fabrication of Heusler Alloy Thin Films from Multiphase Targets Using Pulsed Laser Deposition
Author: Heather M. A. PattonPublisher:
ISBN:
Category :
Languages : en
Pages : 63
Book Description
In this project, the author explored the possibility of growing high quality Heusler alloy thin films from multiphase targets. Bulk targets were found to be partially formed, i.e. not of homogeneous L21 structure, through x-ray diffraction measurements. Pulsed laser deposition is a technique that can provide a congruent transfer of material from the target to the substrate, even in some cases where the target is not of a single crystalline phase. It was the objective of this work to determine whether L21 structured thin films of Co2MnAs[subscript x]Ge(1[subscript x]) could be grown from multiphase targets. Measurements have been carried out to study the magnetic and structural properties of the Heusler alloys Co2MnAs[subscript x]Ge(1−[subscript x]). The optimization parameters that were investigated were substrate type, growth temperature, laser parameters, film thickness, and other common deposition parameters. Temperature-dependent magneto-optic Kerr effect (MOKE) techniques were used to study the qualitative magnetic properties. Alternating current (AC) susceptibility (using a MOKE technique) measurements were made as a function of temperature to view the second-order transition and obtain the Curie temperatures. Frequency dependent AC susceptibility was measured to determine the frequency dependence of the AC susceptibility for Co2MnAs[subscript x]Ge(1−[subscript x]).
Current Research in Pulsed Laser Deposition
Author: Liviu DutaPublisher: MDPI
ISBN: 3036510443
Category : Medical
Languages : en
Pages : 224
Book Description
Despite its limitation in terms of surface covered area, the PLD technique still gathers interest among researchers by offering endless possibilities for tuning thin film composition and enhancing their properties of interest due to: (i) the easiness of a stoichiometric transfer even for very complex target materials, (ii) high adherence of the deposited structures to the substrate, (iii) controlled degree of phase, crystallinity, and thickness of deposited coatings, (iv) versatility of the experimental set-up which allows for simultaneous ablation of multiple targets resulting in combinatorial maps or consecutive ablation of multiple targets producing multi-layered structures, and (v) adjustment of the number of laser pulses, resulting in either a spread of nanoparticles, islands of materials or a complete covering of a surface. Moreover, a variation of PLD, known as Matrix Assisted Pulsed Laser Evaporation, allows for deposition of organic materials, ranging from polymers to proteins and even living cells, otherwise difficult to transfer unaltered in the form of thin films by other techniques. Furthermore, the use of laser light as transfer agent ensures purity of films and pulse-to-pulse deposition allows for an unprecedented control of film thickness at the nm level. This Special Issue is a collection of state-of-the art research papers and reviews in which the topics of interest are devoted to thin film synthesis by PLD and MAPLE, for numerous research and industry field applications, such as bio-active coatings for medical implants and hard, protective coatings for cutting and drilling tools withstanding high friction and elevated temperatures, sensors, solar cells, lithography, magnetic devices, energy-storage and conversion devices, controlled drug delivery and in situ microstructuring for boosting of surface properties.
Growth and Magnetism of Metallic Thin Films and Multilayers by Pulsed-laser Deposition
Author: Jian ShenHalf-metallic Materials and Their Properties
Author: C. Y. FongPublisher: World Scientific
ISBN: 1908977132
Category : Technology & Engineering
Languages : en
Pages : 304
Book Description
This volume provides a detailed treatment of half-metallic materials and their properties from both an experimental and theoretical point of view. It discusses the methods used to understand and predict the properties of half-metals and the gamut of other materials amenable to these techniques. It also offers an expansive bibliography to facilitate further and deeper research. This book provides the precise definitions of all key terminology used in the vast and varied literature.This is the first comprehensive monograph on the subject and will serve as a starting point for graduate students and senior researchers who wish to enter the field. This book will also be an invaluable reference to those already working in the areaof half-metallic materials.
Direct Growth of Metallic TiH2 Thin Films by Pulsed Laser Deposition
Author: Growth of Metal-nitride Thin Films by Pulsed Laser Deposition
Author: Ian Laurence FarrellPublisher:
ISBN:
Category : Thin films
Languages : en
Pages : 274
Book Description
Epitaxial Growth of Metal Fluoride Thin Films by Pulsed-laser Deposition
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
We have studied growth of GdLiF4 thin films for optical waveguide applications. Epitaxial, c-axis oriented GdLiF4 films wer grown from undoped GdLiF4 targets in an on-axis Pulsed-laser deposition geometry on (100) CaF2. These films exhibit a high density of particulates on the surface which are ejected from the target in the ablation process. Growth from Nd-doped polycrystalline GdLiF4 ablation targets results in smooth films with lower particulate densities, as Nd doping increases the optical absorption of GdLiF4 at the ablation laser wavelength 193 nm and permits efficient pulsed-laser deposition. Optical emission spectra of the ablation pume reveals the presence of atomic F, Gd, and Li, indicating the dissociation of the metal-fluorine bonds in the ablation process. In addition, we find that the residual background oxygen pressure must be reduced to avoid formation of Gd4O3F6 as an impurity oxyfluoride phase in the films.
Lasers and Applications
Author: Krzysztof M. AbramskiPublisher: SPIE-International Society for Optical Engineering
ISBN:
Category : Science
Languages : en
Pages : 838
Book Description
Proceedings of SPIE present the original research papers presented at SPIE conferences and other high-quality conferences in the broad-ranging fields of optics and photonics. These books provide prompt access to the latest innovations in research and technology in their respective fields. Proceedings of SPIE are among the most cited references in patent literature.