Author: Humaira Taz
Publisher:
ISBN:
Category : Moore's law
Languages : en
Pages : 109
Book Description
Amorphous oxides which are transparent and conducting find use in display devices and as top electrodes in energy applications, while those which are conducting and magnetic have the potential to be used in spintronics. With the fast approaching limit of Moore’s law, new materials are needed where the spin and polarization of the electrons are coupled. Despite progress in transparent conductors, materials selection is limited by the need to have wide optical bandgap and conduction via s-orbital. In contrast, search for new spintronics materials has picked up only in the last decade. Here we report the synthesis, characterization, and application of a new oxide made from Fe, Tb, and Dy - elements that do not conduct via the s-orbital. Thin films (100 nm) of this oxide were synthesized by pulsed laser deposition (PLD) as a function of varying oxygen pressure, and by electron-beam evaporation as a function of the cation composition, and then annealed under different conditions. Films deposited at 5x10-8 Torr exhibited high optical transparency (90%) and conductivity (~104 S/m). Films deposited at O2 pressures below 1x10-5 Torr were conductive (~104 S/m), magnetic (up to 480 emu/cc), and optically transparent, while the ones above 1x10-5 Torr were optically transparent but insulating and non-magnetic. Changes in the cation stoichiometry showed the films’ transition from being metallic to semiconducting with decreasing Fe content relative to the Lanthanides. However, when a very iron-rich film was annealed through several heating and cooling cycles in low vacuum, the film evolved into a semiconductor that was stable in ambient conditions and showed very high conductivity (2.8x105 S/m) and room temperature magnetism (380 emu/cc). The PLD deposited films were utilized as the ferromagnetic layer for magneto-electric coupling with bismuth ferrite as well as a top electrode for bismuth ferrite capacitors. A giant magneto-resistance (GMR) device made from the Fe-Tb-Dy-oxide and bismuth ferrite showed evidence of magneto-electric coupling at room temperature. The discovery of this oxide not only introduces new materials physics that could be explored and exploited to engineer new multifunctional materials, but the oxide itself proves to be very promising for spintronics device applications.
Novel Amorphous Iron-dysprosium-terbium-oxide Thin Films
Author: Humaira Taz
Publisher:
ISBN:
Category : Moore's law
Languages : en
Pages : 109
Book Description
Amorphous oxides which are transparent and conducting find use in display devices and as top electrodes in energy applications, while those which are conducting and magnetic have the potential to be used in spintronics. With the fast approaching limit of Moore’s law, new materials are needed where the spin and polarization of the electrons are coupled. Despite progress in transparent conductors, materials selection is limited by the need to have wide optical bandgap and conduction via s-orbital. In contrast, search for new spintronics materials has picked up only in the last decade. Here we report the synthesis, characterization, and application of a new oxide made from Fe, Tb, and Dy - elements that do not conduct via the s-orbital. Thin films (100 nm) of this oxide were synthesized by pulsed laser deposition (PLD) as a function of varying oxygen pressure, and by electron-beam evaporation as a function of the cation composition, and then annealed under different conditions. Films deposited at 5x10-8 Torr exhibited high optical transparency (90%) and conductivity (~104 S/m). Films deposited at O2 pressures below 1x10-5 Torr were conductive (~104 S/m), magnetic (up to 480 emu/cc), and optically transparent, while the ones above 1x10-5 Torr were optically transparent but insulating and non-magnetic. Changes in the cation stoichiometry showed the films’ transition from being metallic to semiconducting with decreasing Fe content relative to the Lanthanides. However, when a very iron-rich film was annealed through several heating and cooling cycles in low vacuum, the film evolved into a semiconductor that was stable in ambient conditions and showed very high conductivity (2.8x105 S/m) and room temperature magnetism (380 emu/cc). The PLD deposited films were utilized as the ferromagnetic layer for magneto-electric coupling with bismuth ferrite as well as a top electrode for bismuth ferrite capacitors. A giant magneto-resistance (GMR) device made from the Fe-Tb-Dy-oxide and bismuth ferrite showed evidence of magneto-electric coupling at room temperature. The discovery of this oxide not only introduces new materials physics that could be explored and exploited to engineer new multifunctional materials, but the oxide itself proves to be very promising for spintronics device applications.
Publisher:
ISBN:
Category : Moore's law
Languages : en
Pages : 109
Book Description
Amorphous oxides which are transparent and conducting find use in display devices and as top electrodes in energy applications, while those which are conducting and magnetic have the potential to be used in spintronics. With the fast approaching limit of Moore’s law, new materials are needed where the spin and polarization of the electrons are coupled. Despite progress in transparent conductors, materials selection is limited by the need to have wide optical bandgap and conduction via s-orbital. In contrast, search for new spintronics materials has picked up only in the last decade. Here we report the synthesis, characterization, and application of a new oxide made from Fe, Tb, and Dy - elements that do not conduct via the s-orbital. Thin films (100 nm) of this oxide were synthesized by pulsed laser deposition (PLD) as a function of varying oxygen pressure, and by electron-beam evaporation as a function of the cation composition, and then annealed under different conditions. Films deposited at 5x10-8 Torr exhibited high optical transparency (90%) and conductivity (~104 S/m). Films deposited at O2 pressures below 1x10-5 Torr were conductive (~104 S/m), magnetic (up to 480 emu/cc), and optically transparent, while the ones above 1x10-5 Torr were optically transparent but insulating and non-magnetic. Changes in the cation stoichiometry showed the films’ transition from being metallic to semiconducting with decreasing Fe content relative to the Lanthanides. However, when a very iron-rich film was annealed through several heating and cooling cycles in low vacuum, the film evolved into a semiconductor that was stable in ambient conditions and showed very high conductivity (2.8x105 S/m) and room temperature magnetism (380 emu/cc). The PLD deposited films were utilized as the ferromagnetic layer for magneto-electric coupling with bismuth ferrite as well as a top electrode for bismuth ferrite capacitors. A giant magneto-resistance (GMR) device made from the Fe-Tb-Dy-oxide and bismuth ferrite showed evidence of magneto-electric coupling at room temperature. The discovery of this oxide not only introduces new materials physics that could be explored and exploited to engineer new multifunctional materials, but the oxide itself proves to be very promising for spintronics device applications.
Ferroelectric-like Properties of Amorphous Metal Oxide Thin Films Prepared by Sol-gel Technique
Author: Yuhuan Xu
Publisher:
ISBN:
Category :
Languages : en
Pages : 354
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 354
Book Description
Structure and Magnetic Properties of Epitaxial Terbium-iron Thin Films
Author: Chuei-Tang Wang
Publisher:
ISBN:
Category :
Languages : en
Pages : 286
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 286
Book Description
Structure and Bonding in Amorphous Iron Carbide Thin Films
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Extractive Metallurgy of Niobium
Author: A.K. Suri
Publisher: Routledge
ISBN: 1351448978
Category : Science
Languages : en
Pages : 272
Book Description
The growth and development witnessed today in modern science, engineering, and technology owes a heavy debt to the rare, refractory, and reactive metals group, of which niobium is a member. Extractive Metallurgy of Niobium presents a vivid account of the metal through its comprehensive discussions of properties and applications, resources and resource processing, chemical processing and compound preparation, metal extraction, and refining and consolidation. Typical flow sheets adopted in some leading niobium-producing countries for the beneficiation of various niobium sources are presented, and various chemical processes for producing pure forms of niobium intermediates such as chloride, fluoride, and oxide are discussed. The book also explains how to liberate the metal from its intermediates and describes the physico-chemical principles involved. It is an excellent reference for chemical metallurgists, hydrometallurgists, extraction and process metallurgists, and minerals processors. It is also valuable to a wide variety of scientists, engineers, technologists, and students interested in the topic.
Publisher: Routledge
ISBN: 1351448978
Category : Science
Languages : en
Pages : 272
Book Description
The growth and development witnessed today in modern science, engineering, and technology owes a heavy debt to the rare, refractory, and reactive metals group, of which niobium is a member. Extractive Metallurgy of Niobium presents a vivid account of the metal through its comprehensive discussions of properties and applications, resources and resource processing, chemical processing and compound preparation, metal extraction, and refining and consolidation. Typical flow sheets adopted in some leading niobium-producing countries for the beneficiation of various niobium sources are presented, and various chemical processes for producing pure forms of niobium intermediates such as chloride, fluoride, and oxide are discussed. The book also explains how to liberate the metal from its intermediates and describes the physico-chemical principles involved. It is an excellent reference for chemical metallurgists, hydrometallurgists, extraction and process metallurgists, and minerals processors. It is also valuable to a wide variety of scientists, engineers, technologists, and students interested in the topic.
Chemical Abstracts
Author:
Publisher:
ISBN:
Category : Chemical abstracts
Languages : en
Pages : 2682
Book Description
Publisher:
ISBN:
Category : Chemical abstracts
Languages : en
Pages : 2682
Book Description
CRC Handbook of Metal Etchants
Author: Perrin Walker
Publisher: CRC Press
ISBN: 9781439822531
Category : Science
Languages : en
Pages : 1434
Book Description
This publication presents cleaning and etching solutions, their applications, and results on inorganic materials. It is a comprehensive collection of etching and cleaning solutions in a single source. Chemical formulas are presented in one of three standard formats - general, electrolytic or ionized gas formats - to insure inclusion of all necessary operational data as shown in references that accompany each numbered formula. The book describes other applications of specific solutions, including their use on other metals or metallic compounds. Physical properties, association of natural and man-made minerals, and materials are shown in relationship to crystal structure, special processing techniques and solid state devices and assemblies fabricated. This publication also presents a number of organic materials which are widely used in handling and general processing...waxes, plastics, and lacquers for example. It is useful to individuals involved in study, development, and processing of metals and metallic compounds. It is invaluable for readers from the college level to industrial R & D and full-scale device fabrication, testing and sales. Scientific disciplines, work areas and individuals with great interest include: chemistry, physics, metallurgy, geology, solid state, ceramic and glass, research libraries, individuals dealing with chemical processing of inorganic materials, societies and schools.
Publisher: CRC Press
ISBN: 9781439822531
Category : Science
Languages : en
Pages : 1434
Book Description
This publication presents cleaning and etching solutions, their applications, and results on inorganic materials. It is a comprehensive collection of etching and cleaning solutions in a single source. Chemical formulas are presented in one of three standard formats - general, electrolytic or ionized gas formats - to insure inclusion of all necessary operational data as shown in references that accompany each numbered formula. The book describes other applications of specific solutions, including their use on other metals or metallic compounds. Physical properties, association of natural and man-made minerals, and materials are shown in relationship to crystal structure, special processing techniques and solid state devices and assemblies fabricated. This publication also presents a number of organic materials which are widely used in handling and general processing...waxes, plastics, and lacquers for example. It is useful to individuals involved in study, development, and processing of metals and metallic compounds. It is invaluable for readers from the college level to industrial R & D and full-scale device fabrication, testing and sales. Scientific disciplines, work areas and individuals with great interest include: chemistry, physics, metallurgy, geology, solid state, ceramic and glass, research libraries, individuals dealing with chemical processing of inorganic materials, societies and schools.
Critical Materials Strategy
Author: Steven Chu
Publisher: DIANE Publishing
ISBN: 1437944183
Category : Reference
Languages : en
Pages : 166
Book Description
This report examines the role of rare earth metals and other materials in the clean energy economy. It was prepared by the U.S. Department of Energy (DoE) based on data collected and research performed during 2010. In the report, DoE describes plans to: (1) develop its first integrated research agenda addressing critical materials, building on three technical workshops convened by the DoE during November and December 2010; (2) strengthen its capacity for information-gathering on this topic; and (3) work closely with international partners, including Japan and Europe, to reduce vulnerability to supply disruptions and address critical material needs. Charts and tables. This is a print on demand report.
Publisher: DIANE Publishing
ISBN: 1437944183
Category : Reference
Languages : en
Pages : 166
Book Description
This report examines the role of rare earth metals and other materials in the clean energy economy. It was prepared by the U.S. Department of Energy (DoE) based on data collected and research performed during 2010. In the report, DoE describes plans to: (1) develop its first integrated research agenda addressing critical materials, building on three technical workshops convened by the DoE during November and December 2010; (2) strengthen its capacity for information-gathering on this topic; and (3) work closely with international partners, including Japan and Europe, to reduce vulnerability to supply disruptions and address critical material needs. Charts and tables. This is a print on demand report.
Metals Abstracts
Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 1602
Book Description
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 1602
Book Description
Nanoscale Materials
Author: Luis M. Liz-Marzán
Publisher: Springer Science & Business Media
ISBN: 0306481081
Category : Science
Languages : en
Pages : 506
Book Description
Organized nanoassemblies of inorganic nanoparticles and organic molecules are building blocks of nanodevices, whether they are designed to perform molecular level computing, sense the environment or improve the catalytic properties of a material. The key to creation of these hybrid nanostructures lies in understanding the chemistry at a fundamental level. This book serves as a reference book for researchers by providing fundamental understanding of many nanoscopic materials.
Publisher: Springer Science & Business Media
ISBN: 0306481081
Category : Science
Languages : en
Pages : 506
Book Description
Organized nanoassemblies of inorganic nanoparticles and organic molecules are building blocks of nanodevices, whether they are designed to perform molecular level computing, sense the environment or improve the catalytic properties of a material. The key to creation of these hybrid nanostructures lies in understanding the chemistry at a fundamental level. This book serves as a reference book for researchers by providing fundamental understanding of many nanoscopic materials.