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The emerging field of spintronics offers the prospect of lower power consumption and higher performances for future technologies. Materials with perpendicular magnetic anisotropy (PMA), like FePd, are promising candidates to be used in spintronic devices. This thesis is a study of the domain-wall structure and the reversal mechanisms in FePd thin films, by means of micromagnetic simulations. The handedness (or chirality) of the domain walls is finally investigated. The results are compared with experimental magnetic measurements and neutron scattering measurements. Le domaine émergent de la spintronique promet un diminution de la consommation d'énergie et de meilleures performances pour les technologies futures. Les matériaux à anisotropie magnétique perpendiculaire (PMA), comme le FePd, sont des candidats prometteurs pour être utilisés dans les dispositifs spintroniques. Ce travail est une étude de la structure des parois des domaines magnétiques et des mécanismes d'inversion dans des couches minces de FePd, au moyen de simulations micromagnétiques. La chiralité des parois est également étudiée. Les résultats sont comparés à des mesures expérimentales magnétiques et de diffraction de neutrons.
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Antiferromagnetic spintronics is an emerging topic in spintronics that is attracting interest due to its wide range of advantages, including terahertz operation, memory without stray fields, and highly efficient spin generation. The discussion of this topic covers aspects ranging from the development of new antiferromagnetic materials to the applications of these materials in devices. Traditionally, antiferromagnets were treated as less common magnetic materials for fundamental studies and applications. However, recent miniaturisation and high-frequency operation have revealed that they are advantageous over conventional ferromagnets. This Special Issue reviews the current status and future perspectives of antiferromagnetic spintronics.
magnetoelectric effect --- antiferromagnetism --- Cr2O3 thin film --- exchange bias --- antiferromagnetic spintronics --- spintronics --- MnN --- magnetism and magnetic materials --- antiferromagnets --- Heusler alloys --- blocking temperature --- spintronic devices --- perpendicular magnetic anisotropy --- ferrimagnet --- perpendicular exchange bias --- amorphous thin films --- spintronic applications --- magnons --- synthetic antiferromagnets --- antiferromagnetic resonance --- micromagnetics --- spin pumping --- spin-orbit torque --- insulating antiferromagnet --- sub-terahertz waves --- spin-Hall effect --- garnet ferrite --- compensated ferrimagnet --- metal organic decomposition --- n/a
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Antiferromagnetic spintronics is an emerging topic in spintronics that is attracting interest due to its wide range of advantages, including terahertz operation, memory without stray fields, and highly efficient spin generation. The discussion of this topic covers aspects ranging from the development of new antiferromagnetic materials to the applications of these materials in devices. Traditionally, antiferromagnets were treated as less common magnetic materials for fundamental studies and applications. However, recent miniaturisation and high-frequency operation have revealed that they are advantageous over conventional ferromagnets. This Special Issue reviews the current status and future perspectives of antiferromagnetic spintronics.
Technology: general issues --- History of engineering & technology --- Energy industries & utilities --- magnetoelectric effect --- antiferromagnetism --- Cr2O3 thin film --- exchange bias --- antiferromagnetic spintronics --- spintronics --- MnN --- magnetism and magnetic materials --- antiferromagnets --- Heusler alloys --- blocking temperature --- spintronic devices --- perpendicular magnetic anisotropy --- ferrimagnet --- perpendicular exchange bias --- amorphous thin films --- spintronic applications --- magnons --- synthetic antiferromagnets --- antiferromagnetic resonance --- micromagnetics --- spin pumping --- spin-orbit torque --- insulating antiferromagnet --- sub-terahertz waves --- spin-Hall effect --- garnet ferrite --- compensated ferrimagnet --- metal organic decomposition --- magnetoelectric effect --- antiferromagnetism --- Cr2O3 thin film --- exchange bias --- antiferromagnetic spintronics --- spintronics --- MnN --- magnetism and magnetic materials --- antiferromagnets --- Heusler alloys --- blocking temperature --- spintronic devices --- perpendicular magnetic anisotropy --- ferrimagnet --- perpendicular exchange bias --- amorphous thin films --- spintronic applications --- magnons --- synthetic antiferromagnets --- antiferromagnetic resonance --- micromagnetics --- spin pumping --- spin-orbit torque --- insulating antiferromagnet --- sub-terahertz waves --- spin-Hall effect --- garnet ferrite --- compensated ferrimagnet --- metal organic decomposition
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The Special Issue on Recent Advances in Nanomagnetism is a compilation of articles, addressing various aspects of magnetic properties and behaviour in low dimensional magnetic materials. One contribution addresses the novel magnetic properties in a nanohybrid of iron oxide and carbide nanoparticles grown in diamond. Magnetic textures, such as skyrmion structures, form an important area of research in nanomagnetism, this forms the topic of another contribution. Several aspects of magnetisation dynamics are addressed in other contributions and relate to the developments of microresonators and microantennas applied to the study of magnetic nanostructures; the ferromagnetic resonance behaviour in nanodot systems are also considered. Materials development forms an important area of study in nanomagnetism, and, as such, the preparation conditions, such as annealing under an applied field, can have important effects on the magnetic properties of thin films and low dimensional structures. Such considerations form the study of one of the contributions. Perpendicular magnetic anisotropy has a number of important applications in magnetic storage materials; this is the subject of two further contributions.
Information technology industries --- Computer science --- magnetic nanohybrid materials --- nanodiamonds --- nanoparticles --- iron carbides --- Fe3C --- spinel-type iron oxide --- Mössbauer spectroscopy --- skyrmions --- micromagnetic simulations --- geometric pinning --- finite-element modelling --- ferromagnetic resonance --- microantenna --- microresonator --- magnetic relaxation --- thin films --- nanostructures --- [Co/Ni]2/PtMn multilayers --- magnetic field annealing --- hysteresis loop vertical shift --- exchange coupling --- nanomagnetism --- magnetic multilayers --- micromagnetism --- magnetization dynamics --- magnetic nanodots --- coupled magnetic thin films --- perpendicular magnetic anisotropy --- n/a --- Mössbauer spectroscopy
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Antiferromagnetic spintronics is an emerging topic in spintronics that is attracting interest due to its wide range of advantages, including terahertz operation, memory without stray fields, and highly efficient spin generation. The discussion of this topic covers aspects ranging from the development of new antiferromagnetic materials to the applications of these materials in devices. Traditionally, antiferromagnets were treated as less common magnetic materials for fundamental studies and applications. However, recent miniaturisation and high-frequency operation have revealed that they are advantageous over conventional ferromagnets. This Special Issue reviews the current status and future perspectives of antiferromagnetic spintronics.
Technology: general issues --- History of engineering & technology --- Energy industries & utilities --- magnetoelectric effect --- antiferromagnetism --- Cr2O3 thin film --- exchange bias --- antiferromagnetic spintronics --- spintronics --- MnN --- magnetism and magnetic materials --- antiferromagnets --- Heusler alloys --- blocking temperature --- spintronic devices --- perpendicular magnetic anisotropy --- ferrimagnet --- perpendicular exchange bias --- amorphous thin films --- spintronic applications --- magnons --- synthetic antiferromagnets --- antiferromagnetic resonance --- micromagnetics --- spin pumping --- spin-orbit torque --- insulating antiferromagnet --- sub-terahertz waves --- spin-Hall effect --- garnet ferrite --- compensated ferrimagnet --- metal organic decomposition --- n/a
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As we all know, electrons carry both charge and spin. The processing of information in conventional electronic devices is based only on the charge of electrons. Spin electronics, or spintronics, uses the spin of electrons, as well as their charge, to process information. Metals, semiconductors, and insulators are the basic materials that constitute the components of electronic devices, and these types of materials have been transforming all aspects of society for over a century. In contrast, magnetic metals, half-metals (including zero-gap half-metals), magnetic semiconductors (including spin-gapless semiconductors), dilute magnetic semiconductors, and magnetic insulators are the materials that will form the basis for spintronic devices. This book aims to collect a range of papers on novel materials that have intriguing physical properties and numerous potential practical applications in spintronics.
n/a --- doping --- spin polarization --- first-principle --- quaternary Heusler alloy --- electronic structure --- Prussian blue analogue --- first-principles calculations --- first-principles calculation --- magnetic anisotropy --- pressure --- Nb (100) surface --- Dzyaloshinskii–Moriya interaction --- optical properties --- skyrmion --- equiatomic quaternary Heusler compounds --- Heusler alloy --- interface structure --- first principles --- magnetism --- spin transport --- first-principles method --- monolayer CrSi2 --- half-metallic material --- H adsorption --- half-metallic materials --- lattice dynamics --- spin gapless semiconductor --- first-principle calculations --- half-metallicity --- bulk CrSi2 --- covalent hybridization --- H diffusion --- electronic property --- MgBi2O6 --- physical nature --- Mo doping --- phase stability --- mechanical anisotropy --- quaternary Heusler compound --- magnetic properties --- exchange energy --- Dzyaloshinskii-Moriya interaction
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This reprint focuses on fundamentals and applied research on magnetic structures with curved geometries. The influence of curvature in the magnetic structures is an appealing topic of research opening novel perspectives to engineer the magnetic textures and the magnetisation reversal processes. Special attention is given to the fabrication and optimisation of magnetic structures, their characterisation and possible use in technological applications.
soft magnetic materials --- amorphous magnetic wires --- magnetic domains --- magneto-optic Kerr effect --- giant magnetoimpedance effect --- magnetic anisotropy --- 3D nanowire networks --- spin caloritronics --- thermoelectricity --- spintronics --- giant magnetoresistance multilayers --- glass-coated microwires --- micromagnetic structure --- impedance --- magnetic permeability --- nanomagnetism --- focused-electron-beam-induced deposition --- nanofabrication --- nanolithography --- magnetic nanowires --- three-dimensional --- core-shell --- purification --- thermal annealing --- electron holography --- cylindrical magnetic nanowires --- magnetocrystalline anisotropy --- magnetochiral configurations --- micromagnetic modeling --- amorphous microwires --- high-frequency magnetoimpedance --- SOLT calibration --- nanoporous anodic alumina template --- electrodeposition --- ALD --- magnetic nanowire and nanotube --- core/shell nanostructure --- FORC analysis --- MOKE --- magnetization reversal --- n/a
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This Special Issue collects ten articles related to the broadly understood physical properties of intermetallic compounds. Differential thermal analysis was carried out, and the temperatures of thermal effects that arise during the reduction of neodymium from a technological salt mixture of KCl–NaCl–CaCl2–NdF3 with a magnesium–zinc alloy were established. For sol–gel products of stoichiometric MgTiO3, accurate thermal expansion coefficients were measured. The effect of various nanoparticles, such as GaF3, ZnF2, Zn(BF4)2 and Ga2O3 additions, on the activity of CsF-RbF-AlF3 flux and mechanical behavior of Al/Steel brazed joints is presented. The effect of Bi substitution on the structural and magnetic properties of Nd1-xBixMnO3 is investigated. Characteristics of hard magnetic materials based on Nd2Fe14B and Ce2Fe14B intermetallic compounds are presented. A special algorithm is presented to support vector regression for estimating the maximum magnetic entropy change of doped manganite-based compounds. We have received information about the mechanical properties of the reactively synthesized porous Ti3SiC2 compound with different apertures. Furthermore, we have presented the experimental results of Zn-doped Al-rich for fast on-board hydrogen production.
Engineering --- Technology --- Ti3SiC2 --- intermetallic compound --- porous material --- mechanical property --- pore size --- elastic modulus --- Al-rich alloy --- hydrogen generation --- Zn addition --- Ga2O3 --- flux --- Zn-Al filler metal --- wettability --- spreadability --- magnetocaloric effect --- support vector regression --- extreme learning machine --- maximum magnetic entropy change --- gravitational search algorithm --- GaF3 --- CsF-AlF3 flux --- R-Fe-B intermetallics --- cerium --- permanent magnets --- simulation --- magnetic anisotropy constant --- hysteresis loop --- coercive force --- residual magnetization --- X-ray diffraction --- perovskites manganites --- AC magnetic susceptibility --- ZnF2 --- Zn(BF4)2 --- mechanical properties --- MgTiO3 --- geikielite --- high-temperature X-ray diffraction --- sol-gel technique --- thermal expansion --- magnesium-zinc-neodymium master alloy --- Mg-Zn-Nd --- magnesium master alloy --- magnesium --- rare-earth metals --- master alloy synthesis --- metallothermic reduction --- History. --- History. --- Ti3SiC2 --- intermetallic compound --- porous material --- mechanical property --- pore size --- elastic modulus --- Al-rich alloy --- hydrogen generation --- Zn addition --- Ga2O3 --- flux --- Zn-Al filler metal --- wettability --- spreadability --- magnetocaloric effect --- support vector regression --- extreme learning machine --- maximum magnetic entropy change --- gravitational search algorithm --- GaF3 --- CsF-AlF3 flux --- R-Fe-B intermetallics --- cerium --- permanent magnets --- simulation --- magnetic anisotropy constant --- hysteresis loop --- coercive force --- residual magnetization --- X-ray diffraction --- perovskites manganites --- AC magnetic susceptibility --- ZnF2 --- Zn(BF4)2 --- mechanical properties --- MgTiO3 --- geikielite --- high-temperature X-ray diffraction --- sol-gel technique --- thermal expansion --- magnesium-zinc-neodymium master alloy --- Mg-Zn-Nd --- magnesium master alloy --- magnesium --- rare-earth metals --- master alloy synthesis --- metallothermic reduction
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This reprint focuses on fundamentals and applied research on magnetic structures with curved geometries. The influence of curvature in the magnetic structures is an appealing topic of research opening novel perspectives to engineer the magnetic textures and the magnetisation reversal processes. Special attention is given to the fabrication and optimisation of magnetic structures, their characterisation and possible use in technological applications.
Research & information: general --- Physics --- Electricity, electromagnetism & magnetism --- soft magnetic materials --- amorphous magnetic wires --- magnetic domains --- magneto-optic Kerr effect --- giant magnetoimpedance effect --- magnetic anisotropy --- 3D nanowire networks --- spin caloritronics --- thermoelectricity --- spintronics --- giant magnetoresistance multilayers --- glass-coated microwires --- micromagnetic structure --- impedance --- magnetic permeability --- nanomagnetism --- focused-electron-beam-induced deposition --- nanofabrication --- nanolithography --- magnetic nanowires --- three-dimensional --- core-shell --- purification --- thermal annealing --- electron holography --- cylindrical magnetic nanowires --- magnetocrystalline anisotropy --- magnetochiral configurations --- micromagnetic modeling --- amorphous microwires --- high-frequency magnetoimpedance --- SOLT calibration --- nanoporous anodic alumina template --- electrodeposition --- ALD --- magnetic nanowire and nanotube --- core/shell nanostructure --- FORC analysis --- MOKE --- magnetization reversal --- soft magnetic materials --- amorphous magnetic wires --- magnetic domains --- magneto-optic Kerr effect --- giant magnetoimpedance effect --- magnetic anisotropy --- 3D nanowire networks --- spin caloritronics --- thermoelectricity --- spintronics --- giant magnetoresistance multilayers --- glass-coated microwires --- micromagnetic structure --- impedance --- magnetic permeability --- nanomagnetism --- focused-electron-beam-induced deposition --- nanofabrication --- nanolithography --- magnetic nanowires --- three-dimensional --- core-shell --- purification --- thermal annealing --- electron holography --- cylindrical magnetic nanowires --- magnetocrystalline anisotropy --- magnetochiral configurations --- micromagnetic modeling --- amorphous microwires --- high-frequency magnetoimpedance --- SOLT calibration --- nanoporous anodic alumina template --- electrodeposition --- ALD --- magnetic nanowire and nanotube --- core/shell nanostructure --- FORC analysis --- MOKE --- magnetization reversal
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This book focuses on advanced nanomaterials for energy conversion and storage, covering their design, synthesis, properties and applications in various fields. Developing advanced nanomaterials for high-performance and low-cost energy conversion and storage devices and technologies is of great significance in order to solve the issues of energy crisis and environmental pollution. In this book, various advanced nanomaterials for batteries, capacitors, electrocatalysis, nanogenerators, and magnetic nanomaterials are presented
Technology: general issues --- porous carbon --- ternary composite --- molybdenum oxide --- molybdenum carbide --- energy storage --- Li-O2 batteries --- composite --- ORR --- OER --- Nb2O5 --- Nb4N5 --- heterostructure --- lithium-sulfur batteries --- catalyst --- TiN/Ta2O5 --- multidimensional carbon --- manipulation --- two-dimension amorphous --- component interaction --- geometric configuration --- electrochemistry --- self-powered --- sports monitoring --- hydrogel --- hybrid nano-generator --- janus --- MXenes --- magnetic properties --- DFT --- MXene --- nitrogen reduction --- electrocatalysis --- Gibbs free energy --- doped graphene --- oxygen reduction reaction --- phosphorus-doped --- codoped --- neutron diffraction --- exchange-bias --- magnetocaloric effect --- spin–orbit torque --- perpendicular magnetic anisotropy --- perpendicular effective field --- zero-field switching --- N/P/Fe co-doped carbon --- self-templating synthesis --- 3D porous structure --- oxygen reduction reaction electrocatalysts --- nanomagnets --- Co nanorods --- solvothermal route --- alcohol–thermal method --- magnetic interaction --- single-atom catalyst --- Au/WSSe --- tensile strain --- n/a --- spin-orbit torque --- alcohol-thermal method
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