Foreward
Preface
ListofContributors
HDDRProcessfortheProductionofHighPerformanceRare-Earth
Magnets
1.1Introduction
1.2HDDRPhenomenainNd-Fe-B
1.2.1HydrogenAbsorption
1.2.2DisproportionationinNd2Fe14B
!.2.3RecombinationofDisproportionatedNd2Fei4B
1.3AnisotropyinHDDRTreatedNd-Fe-BMagnets
1.4HDDRPhenomenainOtherRare-EarthMagneticMaterials
1:4.1Sm2Fei7NxCompound
1.4.2ThMn12-typeCompound
1.4.3Nd3(Fe,Ti)29-TypeCompound
1.5Summary
References
ProcessandMagneticPropertiesofRare-EarthBondedMagnets
2.1Introduction
2.2RecentProgressonRare-EarthMagneticPowdersfor
BondedMagnets
2.2.1isotropicNdFeBPowders
2.2.2LeanNecIsotropicPowders
2.2.3AnisotropicNdFeBPowdersforBondedMagnets
2.2.4SmCoPowderforBondedMagnetApplications
2.2.5OtherMagneticPowders
2.3ProcessandMagneticPropertiesofPolymerBondedRare
EarthMagnets
2.3.1BondedMagnetsProducedbyCompressionMolding
Process
2.3.2HotCompressionMoldingProcess
2.3.3BondedMagnetsProducedbyInjectionMolding
Process
2.3.4BondedMagnetsProducedbyExtrusionProcess
2.4PolymersandPolymerAdditivesforBondedRare-Earth
Magnets
2.5EnvironmentalStabilityofPolymerBondedMagnets
2.6Summary
References
3LaserProcessingofMagneticMaterials
3.1Introduction
3.2LaserCharacteristicsandLaserFacilitiesforMaterials
Processing
3.2.1LaserCharacteristics
3.2.2LasersAvailableforMaterialsProcessing
3.2.3LaserMaterialsInteraction
3.3LaserSurfaceTreatmentofMagneticThinFilms
3.3.1PreciseGrainSizeControlofMagneticThinFilms
3.3.2AlignmentofMagneticGrainsbyLaserAnnealing
3.4InterferometricLaserLithography
3.4.1Multi-StepILL
3.4.2DirectPatterningUsingILL
3.5ConcludingRemarks
References
4ProcessingandPropertiesofNanocompositeNd2Fel4B-Based
PermanentMagnets
4.1Introduction
4.2BasicConsiderationsonProcessingTechniques
4.3PreparationofAmorphousorNanostructuredPrecursors
4.4TransformationofAmorphousorNanostructuredPrecursors
4.5DirectPreparationofNanocompositePermanentMagnets
4.6EffectsofAdditiveElementsonCrystallizationBehavior
4.6.1Fe3B/Nd2Fel4B
4.6.2AdvancedNanocompositePermanentMagnets
BasedonFe3B/Nd2Fe14B
4.6.3a-Fe/Nd2Fel4B
4.7PracticalPropertiesofNanocompositeNd2Fe14B-Based
Magnets
4.7.1MagneticProperties
4.7.2CorrosionBehaviors
4.7.3Magnetizability
4.8ApplicationExamples
4.9FutureSubjects
References
AmorphousandNanocrystallineSoftMagneticMaterials:Tailoringof
MagneticProperties,MagnetoelasticandTransportProperties
5.1Introduction
5.2MagneticProperties:MagnetizationProcess
5.2.1AmorphousRibbons:EffectoftheCompositionand
AppliedStress
5.2.2AmorphousWires:LargeBarkhausenEffect
5.2.3NanocrystallineMaterials:Coercivity
5.3Processing:InducedMagneticAnisotropy
5.3.1AmorphousMetallicAlloys
5.3.2NanocrystallineAlloys
5.3.3InducedMagneticAnisotropyinGlass-Coated
AmorphousMicrowires
5.4Magnetostriction
5.4.1AmorphousMaterials
5.4.2ManocrystallineMaterials
5.5GiantMagnetoImpedanceEffect
5.6SensorApplications
5.6.1MagnetometersUsingAmorphousandNanocrystalline
Materials
5.6.2MagnetoelasticSensors:SensorsBasedonMagnetic
Bistability
5.6.3SensorsBasedonGiantMagneto-Impedance
Effect
References
NanogranularLayeredMagneticFilms
6.1Introduction
6.2IonBeamSputtering
6.3SamplesPreparationandCharacterization
6.4StructuralProperties
6.5MagneticProperties
6.5.1NuclearMagneticResonance
6.5.2RoomTemperatureStaticMagnetization
6.5.3dcandacSQUIDMeasurements
6.5.4FerromagneticResonance
6.6TransportandMagnetotransportProperties
6.6.1ElectricConductioninZeroMagneticField
6.6.2RoomTemperatureMagnetoresistance......
6.6.3InfluenceoftheNumberofBilayersonResistive
andMagnetoresistiveProperties
6.6.4TemperatureDependenceofMagnetoresistance
6.7Conclusions
References
MonodisperseFerromagneticMetalParticles:SynthesisbyChemical
Routes,SizeControlandMagneticCharacterizations
71Introduction
72PreparationofMonodisperseFineFerromagneticMetal
ParticlesbyChemicalRoutes
7.2.1MechanismofParticleFormation
7.2.2ControloftheMorphologicalCharacteristicsofthe
Particles
73CharacterizationofFerromagneticMetalParticlesMade
bythePolyolProcess
7.3.1MorphologicalCharacteristics
7.3.2CrystalStructure
7.3.3ChemicalComposition
7.3.4Core-ShellMicrostructure
7.3.5StaticMagneticProperties
74MagneticResonanceinFineParticles
7.4.1TheoreticalBackground
7.4.2MagneticResonanceinPolyolMadeParticles
75ConclusionsandPerspectives
References
MonocrystallineHalf-MetallicNiMnSbThinFilms:Preparation
andCharacterization
8.1Introduction
8.2TheHalf-MetallicSemi-HeuslerNiMnSb
8.2.1HeuslerAlloys
8.2.2TheHalf-Metals
8.2.3TheCaseofNiMnSb
8.3GrowthandStructureofEpitaxialNiMnSbThinFilms
8.3.1PtMnSb
8.3.2PIMnSb/NiMnSbMultilayers
8.3.3PolycrystallineNiMnSbThinFilms
8.3.4EpitaxialGrowthofNiMnSb
8.3.5SurfaceMorphologyoftheEpilaxialFilms
8.4MagnetismandTransportPropertiesofNiMnSbThinFilms
8.4.1HysteresisCycles
8.4.2MagnetocrystallineAnisotropy
8.4.3NiMnSbThinFilmResistivity
8.5EvidencesoftheHalf-MetallicCharacter
8.5.1OverviewofMagneticExcitationsinHalf-Metals
8.5.2ElectricalResistivity
8.5.3Magnetoresistance
8.5.4HallEffect
8.5.5Magnetization
8.6Conclusions
References
BulkAmorphousMagneticMaterials
9.1Introduction
9.2ProcessingandCharacterizationofBulkAmorphousMagnetic
Alloys
9.2.1Melt-SpinningTechniqueUsedforthePreparationof
"Bulk"AmorphousRibbons
9.2.2PreparationofBulkAmorphousMagneticRodsandRings
byCastingTechniques
9.2.3MethodsandTechniquesUsedforStructuraland
MagneticCharacterizationofBulkAmorphous
MagneticAlloys
9.3SoftMagneticBulkAmorphousAlloys
9.3.1Background
9.3.2TheFormationoftheAmorphousPhasein(Fe,Co,Ni)70(Zr,Nb,M)10B20(M=Zr,Ti,Ta,Mo)Systems
9.3.3ElectricResistivityofFe-BasedBulkAmorphousAlloys
9.3.4MagneticPropertiesof(Fe,Co,Ni)70(Zr,Nb,M)10B20
BulkAmorphousAlloysintheAs-quenchedState
9.3.5MagneticPropertiesofFe-Zr-B-BasedBulkAmorphousAlloysVersusAnnealing
9.4High-OoercivityBulkAmorphousAlloys
9.4.1Background
9.4.2Glass-FormingAbilityinNd-Fe-(AI,Si)Systems
9.4.3X-rayandNeutronDiffractionExperimentsonNd90-x
FexAl10-ySiyBulkMetallicAlloys
9.4.4MagneticPropertiesofNd90-xFexAl10-ySiyBulkAmorphousAlloys
9.4.5MossbauerSpectra
9.5RelationshipbetweenMicrostructureandMagneticPropertiesinBulkAmorphousAlloys
9.5.1SoftMagneticBulkAmorphousAlloys
9.5.2High-CoercivityBulkAmorphousAlloys
9.6FuturePerspectives
References
Index
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