Ebook: Magnetic Hysteresis in Novel Magnetic Materials

A detailed presentation of the physics of the various hysteresis models that are currently used to explain the magnetization reversal process, including coherent and incoherent magnetization processes, micromagnetism and its application in thin films, multilayers, nanowires, particles and bulk magnets, domain wall pinning and domain wall dynamics, and Preisach modelling. Some of the faulty concepts and interpretations that still exist in the literature are rectified. Magnetic imaging techniques are reviewed, including TEM, SEM, magnetic force microscopy, and optical microscopy. Temperature, field and angular dependence of coercivity, magnetic interactions and magnetic phenomena are reviewed and their effect on magnetic hysteresis is discussed. The magnetic properties of novel materials are discussed, including nanoparticles, nanocrystalline granular solids, particulate media, thin films, and bulk magnets. Finally, present and future applications of novel materials are presented, including magnetic and magneto-optic recording media, magneto-electronics, sensors, magnetic circuit design, and novel structures created from rigid, high-energy permanent magnets.

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Content:
Front Matter....Pages i-xiv
Coherent and Incoherent Magnetization Processes in Non-Interacting Particles....Pages 1-20
Interaction effects in Fine Particle Systems....Pages 21-35
A Monte Carlo Simulation of the Hysteresis Behavior of Small Magnetic Particles....Pages 37-44
Micromagnetics of Thin Films and Multilayers....Pages 45-48
Micromagnetism of Small Structures....Pages 49-68
Magnetic Hysteresis in Bilayer....Pages 69-78
Micromagnetism and the Microstructure of Modern Magnetic Materials....Pages 79-84
Stochastic Model for Domain Wall Dynamics and Ferromagnetic Hysteresis....Pages 85-108
Influence of Defects Shape and Period on Domain Wall Coercive Field....Pages 109-113
Avalanches Size Distribution in Model Hard Magnetic Materials Having Different Textures....Pages 115-119
Domain Wall Dynamics and Preisach Modeling....Pages 121-124
The Effect of Thermally Induced Relaxation on the Remanent Magnetization in a Moving Preisach Model....Pages 125-146
A Vectorial Preisach-Type Model for Magnetic Hysteresis for Interacting Stoner-Wohlfarth Particles....Pages 147-157
An Experimental System of the Classical Preisach Model of Magnetic Hysteresis....Pages 159-163
Analysis of the Identification Methodologies in Preisach Modeling....Pages 165-171
First Principles Determination of Hyperfine Fields in Pt/Fe (111) Multilayers....Pages 173-177
Critical Behavior of the Thermal Conductivity near a Magnetic Phase Transition....Pages 179-185
Imaging Magnetic Structures in the Transmission Electron Microscope....Pages 187-193
Domains, Domain Walls and the Magnetisation Reversal Process....Pages 195-206
Magnetic Force Microscopy of Sintered NdFeB....Pages 207-214
Magnetic Viscosity and Hysteresis Phenomena....Pages 215-219
Quantum Hysteretic Phenomena in Mn12-Acetate Magnetic Clusters....Pages 221-232
Anomalous Magnetic Aftereffect....Pages 233-242
NMR as a Tool in Structural Studies of Modern Magnetic Materials....Pages 243-252
Particulate Magnetic Recording Media....Pages 253-258
Angular Dependence of Magnetization Reversal and N?el Brown Theory....Pages 259-281
Anomalous Hysteresis Properties in Ferrimagnetic and Antiferromagnetic Nanoparticles....Pages 283-292
Magnetisation Reversal in Cobalt and Permalloy Nano-Elements....Pages 293-307
Magnetization Dependence on Temperature and Grain Size in Nanostructured Samples....Pages 309-313
Magnetic Characterization of Ni Nanoparticles Dispersed in Silica....Pages 315-319
Fine Particle Magnetism in SmCo5 Produced by Ball Milling....Pages 321-325
The Application of Spark Erosion to the Synthesis of Thin Films Containing Ultrafine Particles....Pages 327-331
Compaction of Chemically Prepared Amorphous Fe-B Nanoparticles....Pages 333-337
Magnetic Behaviour of ?-Fe2O3Nanoparticles....Pages 339-343
Hysteresis Loops and Remanence Curves of Small ?-Fe2O3 Particles with Different Packing Densities....Pages 345-349
Irreversible and Time Dependent Magnetic Behavior of ?-Fe2O3 Interacting Particles....Pages 351-355
Anomalies in the Relaxation of Small Magnetic Particles at Very Low Temperatures....Pages 357-361
Magnetic Properties of Nanocrystalline CoFe2O4 Particles....Pages 363-373
Coercivity Enhancement in CuFe2O4 and MnXFe3-XO4 (1<X?2) Due to Oxidation and Jahn-Teller Distortion....Pages 375-382
Influence of Fe-Co Nanoinclusions on the Magnetic Behavior of Fe-Co Ferrites....Pages 383-387
Interactions and Demagnetization in Nanostructured Magnetic Materials: Nanocrystalline Particles and Granular Films....Pages 389-393
Interaction Effects on Magnetic Relaxation in an Fe20Ag80 Granular Film....Pages 395-399
Magnetic Hysteresis in Novel Nanostructured Films....Pages 401-405
Microstructure and Coercivity in Thin Films and Multilayers....Pages 407-411
Structure and Magnetism of Epitaxial Rare-Earth-Transition-Metal Films....Pages 413-417
Magnetic Anisotropy of Ultra-Thin Films and Multilayers....Pages 419-451
Domain Confinement in Mesoscopic Epitaxial Cobalt Patches....Pages 453-465
Temperature Dependence of Hysteresis Loops of NI Films-Characteristics of Fine-Grained Structure....Pages 467-478
Perpendicular Anisotropy and Domain Structure in Granular Magnetic Solids....Pages 479-483
Novel Hysteresis Phenomena in Ti-Fe Granular Thin Films....Pages 485-497
Stoichiometry and Magnetic Properties of Reactively Sputtered Fe-O Films....Pages 499-503
Variations of Coercivity (Hc) and Remanence Magnetization (Mr) as a Function of Layer Thickness in Nife/Ag Ultrathin Multilayers....Pages 505-509
Experimentally Observed and Theoretically Simulated Inverted-Hysteresis Loops in Pd-Ni Multilayers....Pages 511-515
Instability of Perpendicular-Magnetization Hysteresis Features in Pt-Ni and Pd-[CoPd] Multilayers....Pages 517-522
Visualization of Domain Wall Propagation in Ultra-Thin Co/Pt Films Using Transmission Electron Microscopy....Pages 523-528
CoNiO/NiO and NiMn Exchange Biasing Materials....Pages 529-532
Magnetization Process in Co/Cr/Co Trilayers with Ferro- and Antiferromagnetic Interlayer Coupling....Pages 533-536
Magnetoresistance of MBE-Grown Co/Cu Multilayers....Pages 537-542
Giant Moment in Sputtered Fe-N Films Grown Epitaxially on SI (001)....Pages 543-547
Review of Bulk Permanent Magnets....Pages 549-553
Nanocrystalline Hard Magnetic Rare Earth Alloys....Pages 555-560
Exchange Interaction in Multiphase Systems....Pages 561-565
Magnetization Processes in Composite Systems....Pages 567-597
Microstructural Investigations of Exchange Coupled and Decoupled Nanocrystalline FeNdB Permanent Magnets....Pages 599-608
A Study of the Effect of Magnetizing Field Strength on the Measured Values of Intrinsic Coercivity and Remanence in Commercial Rare-Earth Magnets....Pages 609-618
Domain Wall Pinning by Radiation Damage in Sm2Fe17N3 Powders....Pages 619-630
Permanent Magnet Powders Produced by Gas Atomization....Pages 631-637
Magnetic Viscosity Measurements on FeNdB - Magnets with Different Microstructure....Pages 639-644
Magnetic Phase Transitions and Magnetic Crystalline Anisotropy in SmFe11-xCoxTi Compounds....Pages 645-649
Upscaling the Production of Sm2Fe17N3 Permanent Magnetic Powders....Pages 651-655
High Coercivity in Ultra-Fine Grained PrFeBCu Alloy Prepared by Torsion Deformation....Pages 657-661
Canting Effects in Nucleation and Reversal Processes of RE-TM Compounds....Pages 663-667
Soft Magnetic Materials....Pages 669-672
Amorphous and Nanocrystalline Soft Magnets....Pages 673-677
Losses and Domain Structure Vs Induced Anisotropies in Zeromagnetostrictive Amorphous Alloys....Pages 679-683
Temperature Dependence of Coercivity of Some Soft Magnetic Materials....Pages 685-709
Evolution of the Magnetic Properties with Annealing Temperature for CoMnSiB Microwires....Pages 711-730
Magnetic Hysteresis in Amorphous Glass-Covered Wires....Pages 731-736
Present Status and Future Magnetic Data Storage....Pages 737-741
Permanent Magnet Design: Methods of Magnetic Circuit Design....Pages 743-748
Permanent Magnet Design: Magnetic Cladding and Periodic Structures....Pages 749-754
Permanent Magnet Design: Hollow Cylindrical and Spherical Structures....Pages 755-759
Some Aspects of the Design and Operation of the Polyphase Hysteresis Motor....Pages 761-765
Low-Hysteresis Co/Cu Multilayers for Position Sensors....Pages 767-780
Back Matter....Pages 781-809
....Pages 811-844