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Magnetic Materials and their Applications discusses the principles and concepts behind magnetic materials and explains their applications in the fields of physics and engineering.
The book covers topics such as the principal concepts and definitions related to magnetism; types of magnetic materials and their electrical and mechanical properties; and the different factors influencing magnetic behavior. The book also covers topics such as permanent-magnet materials; magnetic materials in heavy-current engineering; and the different uses of magnetic materials.
The text is recommended for physicists and electrical engineers who would like to know more about magnetic materials and their applications in the field of electronics.
Contenu
Contents
Chapter 1
Introduction
Chapter 2
Review of Magnetic Effects
2.1 Preliminary Remarks
2.2 The Most Important Effects
2.2.1 The Joule Effect
2.2.2 The Faraday Effect
2.2.3 The Matteucci Effect
2.2.4 The Wiedemann Effect
2.2.5 The Villau Effect
2.2.6 The Kerr Effect
2.2.7 The Hopkinson Effect
2.2.8 The Cotton-Mouton Effect
2.2.9 The Barnett Effect
2.2.10 The Einstein-de-Haas Effect
2.2.11 The Barkhausen Effect
2.2.12 The magnetothermal Effect
2.2.13 The Hughes Effect
Chapter 3
Magnetic Parameters of Materials
3.1 Types of Magnetic Materials
3.1.1 Paramagnetic Materials
3.1.2 Diamagnetic Materials
3.1.3 Ferromagnetic Materials
3.1.4 Ferrimagnetic Materials
3.1.5 Antiferromagnetic Materials
3.1.6 Metamagnetic Materials
3.2 The Principal Concepts and Definitions
3.2.1 Susceptibility
3.2.2 Magnetic Flux Density
3.2.3 Magnetisation
3.2.4 The Various Permeabilities
3.2.5 Magnetic Losses
3.2.6 Permeability as a Function of Temperature
3.2.7 Losses as a Function of Temperature
3.2.8 Drop in Permeability With Time
3.2.9 Permeability as a Function of Frequency
3.2.10 Losses as a Function of Frequency
3.2.11 Magnetostriction
3.2.12 The Hysteresis Loop
3.2.13 The Demagnetising Factor
3.2.14 Magnetic Anisotropics
Chapter 4
The Magnetising Process and the Basis of the Hysteresis Loop
4.1 The Origin of Magnetism
4.2 Magnetic Domains
4.2.1 Making the Domains Visible
4.2.2 Size and Shape of Domains
4.2.3 The Bloch Wall
4.3 The Magnetising Process
4.3.1 Bloch-wall displacement
4.3.2 Bloch-wall energy
4.3.3 The reversible rotation process
4.3.4 The irreversible rotation process
4.4 Magnetising Processes and the Hysteresis Loop for Polycrystalline Materials
4.4.1 The initial magnetising curve
4.4.2 The limiting loop
4.4.3 The hysteresis family
4.4.4 The ideal magnetising curve
4.5 Magnetising Processes in Single Crystals
4.5.1 The iron single crystal
4.5.2 The nickel single crystal
4.5.3 The cobalt single crystal
4.5.4 Ferrite single crystals
4.6 Micromagnetics
4.7 Magnetisation of Thin Films
4.7.1 The Néel wall
4.7.2 Crosstie walls
4.7.3 Intermediate walls
4.8 The Rayleigh Loop
4.9 The Steinmetz Law
4.10 The Various Segments of the Hysteresis Loop and Their Practical Applications
Chapter 5
The Various Shapes of Hysteresis Loops and Their Physical Causes
5.1 The Normal Hysteresis Loop
5.2 The Rectangular Loop
5.2.1 Rectangular loops in metals
5.2.2 Rectangular loops in ferrites
5.3 Perminvar Loops
5.3.1 Perminvar loops in metals and alloys
5.3.2 Perminvar loops in ferrites
5.3.3 Transformation of Perminvar loops to rectangular shape
5.4 Isoperm Loops
5.4.1 Isoperm loops in metals and alloys
5.4.2 Isoperm loops in ferrites
Chapter 6
Factors Influencing Magnetic Behaviour
6.1 The Influence of Impurities and Low-level Additives
6.1.1 Metallic materials
6.1.2 Oxide materials
6.2 Effect of the Manufacturing Process
6.2.1 Effect of rolling temperature for sheet or strip
6.2.2 Effect of heat treatment on high-permeability materials
6.2.3 Effect of heat treatment on permanent magnets
6.2.4 Effect of sintering on metallic dusts
6.2.5 Effect of sintering conditions on the preparation of ferrites
6.2.6 Shape effects
6.3 Effects due to Mechanical Working
6.3.1 Effect of winding strip cores
6.3.2 Effect of stacking
6.3.3 Effect of resin encapsulation
6.4 Ambient Effects
Chapter 7
Mechanical Properties
7.1 Crystal Structure
7.1.1 Iron
7.7.2 Nickel
7.1.3 Fe-Ni alloys
7.1.4 Cobalt
7.7.5 Cubic ferrites
7.7.6 Hexagonal ferrites
7.2 Density
7.3 Melting Point
7.4 Special Mechanical Properties
Chapter 8
Electrical Properties of Magnetic Materials
8.1 Specific Electrical Resistance
8.1.1 The electrical resistance of metals and alloys
8.1.2 Specific electrical resistance as a function of temperature
8.1.3 The electrical resistance of ferrites
8.2 Dielectric Constant and Loss Angle
8.2.1 Heterogeneous bodies (dust cores)
8.2.2 Ferrites
Chapter 9
Permanent-Magnet Materials
9.1 Role of the Permanent Magnet
9.2 Descriptive Characteristics of Permanent-magnet Materials
9.3 The Optimum Working Point
9.4 Dimensioning a Permanent Magnet
9.5 Fulness Factor
9.6 Stabilising
9.7 Influence of Temperature
9.8 Residual Effect and Ageing
9.9 The Working Line
9.10 The Fundamental Types of Permanent-Magnet Materials
9.10.1 Martensitic steels
9.10.2 Precipitation alloys
9.10.3 Cold-deformed permanent magnets
9.10.4 Superstructure alloys
9.10.5 Materials for dust magnets
9.10.6 Ceramic magnet materials (ferrites)
9.10.7 Materials having exchange anisotropy
9.11 Varieties of Permanent-Magnet Materials Available From Industry
9.12 Applications of Permanent Magnets
Chapter 10
Magnetic Materials in Heavy-Current Engineering
10.1 Requirements for Laminated Materials
10.1.1 Requirements for transformer sheet
10.1.2 Requirements for dynamo sheet and electrosheet
10.1.3 Requirements for materials for level-convertor cores
10.2 Unalloyed Iron
10.3 Fe-Si Alloys
10.3.1 Effect of silicon content
10.3.2 Effect of impurities
10.3.3 Effect of grain size
10.3.4 Temperature dependence of losses
10.3.5 Properties of hot-rolled electrosheet
10.3.6 Cold-rolled Fe-Si sheet
10.4 Fe-Al Alloys
10.5 Fe-Si-Al Alloys
10.6 Fe-Co Alloys
10.7 Ferrite Cores for Power Transformers
Chapter 11
Materials for Transductor Cores
11.1 Principles and Properties of a Transductor
11.2 Transductor Applications
11.3 Requirements for Core Material
11.4 Miscellaneous Materials
11.4.1 Hot-rolled Fe-Si sheet
11.4.2 Grain-oriented Fe-Si sheet
11.4.3 Fe-Ni alloys
11.4.4 Fe-Co alloys
11.4.5 Ferrites
11.5 Effect of Core Construction
Chapter 12
Magnetic Materials for Relays
12.1 Uses and Properties of the Electromagnetic Relay
12.2 Material Requirements for Core and Yoke
12.3 Magnetic Ageing
12.4 Classification of Magnetically Soft Materials for Relays
12.5 Unalloyed Iron
12.6 Fe-Si Alloys
12.7 Fe-Ni Alloys
12.8 Fe-Co Alloys
12.9 Ferrites
Chapter 13
Core Materieals for Inductance Coils and Transformers
13.1 Magnetic Materials in Communications Technology
13.2 Inductively Loaded Conductors
13.3 Specified Requirements for Inductance Coils and Transformer Cores
13.4 Solid Metal and Alloy Core Materials
13.4.1 Core shapes
13.4.2 Types of materials for the cores of communications transformers
13.4.3 Fe-Si alloys
13.4.4 Fe-Al alloys
13.4.5 Fe-Si-Al alloys
13.4.6 Fe-Ni alloys
13.4.7 Fe-Ni-Mo alloys
13.4.8 Fe-Ni-Cr alloys
13.4.9 Fe-Ni-Co alloys
13.4.10 Fe-m-Cu alloys
13.4.11 Fe-Co alloys
13.5 Dust Cores
13.5.1 Core shapes
13.5.2 Compa…