Characterization and Measurement of Magnetic Materials -  Fausto Fiorillo

Characterization and Measurement of Magnetic Materials (eBook)

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2004 | 1. Auflage
666 Seiten
Elsevier Science (Verlag)
978-0-08-052892-2 (ISBN)
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Correct and efficient measurements are vital to the understanding of materials properties and applications. This is especially so for magnetic materials for which in last twenty years, our understanding and use have changed dramatically. New or improved materials have been created and have reached the market. The Soft amorphous alloys, the Fe-based rare-earth magnets and the giant magnetorestrictive and magnetoresistive materials have all posed challenges to measurement. At the same time new digital measurement techniques have forced a change in laboratory and commercial measuring setups. A revision of measuring standards also occurred in the 1990s with the result that there is now a lack of up-to-date works on the measurement of magnetic materials.

The basic objective of this work is to provide a comprehensive overview of the properties of the hard and soft magnetic materials relevant to applications and of thoroughly discussing the modern methodologies for employed in the measurement of these properties. The balance of these topics results in a complete text on the topic, which will be invaluable to researchers, students and practitioners in industry. It will be of significant interest not only to scientists working in the fields of power engineering and materials science but also to specialists in measurement who be able to easily find all the information they need.

* Comprehensive overview of the properties of the hard and soft magnetic materials

* Provides applications and discusses thoroughly the modern methodologies for employed in the measurement of these properties

* Provides the latest up-to-date works on the measurement of magnetic materials
Correct and efficient measurements are vital to the understanding of materials properties and applications. This is especially so for magnetic materials for which in last twenty years, our understanding and use have changed dramatically. New or improved materials have been created and have reached the market. The Soft amorphous alloys, the Fe-based rare-earth magnets and the giant magnetorestrictive and magnetoresistive materials have all posed challenges to measurement. At the same time new digital measurement techniques have forced a change in laboratory and commercial measuring setups. A revision of measuring standards also occurred in the 1990s with the result that there is now a lack of up-to-date works on the measurement of magnetic materials. The basic objective of this work is to provide a comprehensive overview of the properties of the hard and soft magnetic materials relevant to applications and of thoroughly discussing the modern methodologies for employed in the measurement of these properties. The balance of these topics results in a complete text on the topic, which will be invaluable to researchers, students and practitioners in industry. It will be of significant interest not only to scientists working in the fields of power engineering and materials science but also to specialists in measurement who be able to easily find all the information they need. - Comprehensive overview of the properties of the hard and soft magnetic materials- Provides applications and discusses thoroughly the modern methodologies for employed in the measurement of these properties- Provides the latest up-to-date works on the measurement of magnetic materials

Cover 1
Copyright Page 5
Contents 10
Foreword 8
Preface 14
Acknowledgments 18
Part I: Properties of Magnetic Materials 20
Chapter 1. Basic Phenomenology in Magnetic Materials 22
1.1 Magnetized Media 22
1.2 Demagnetizing Fields 27
1.3 Magnetization Process and Hysteresis 35
Chapter 2. Soft Magnetic Materials 44
2.1 General Properties 45
2.2 Pure Iron and Low-Carbon Steels 52
2.3 Iron–Silicon Alloys 57
2.4 Amorphous and Nanocrystalline Alloys 70
2.5 Nickel–Iron and Cobalt-Iron Alloys 80
2.6 Soft Ferrites 84
2.7 Soft Magnetic Thin Films 92
Chapter 3. Operation of Permanent Magnets 108
3.1 Magnetic Circuit and Energy Product 109
3.2 Dynamic Recoil 114
3.3 Electrical Analogy and Numerical Modeling 117
Part II: Generation and Measurement of Magnetic Fields 122
Chapter 4. Magnetic Field Sources 124
4.1 Filamentary Coils 124
4.2 Thick Coils 136
4.3 AC and Pulsed Field Sources 142
4.4 Permanent Magnet Sources 151
4.5 Electromagnets 164
Chapter 5. Measurement of Magnetic Fields 178
5.1 Fluxmetric Methods 180
5.2 Hall Effect and Magnetoresistance Methods 194
5.3 Ferromagnetic Sensor Methods 215
5.4 Quantum Methods 236
5.5 Magnetic Field Standards and Traceability 281
Part III: Characterization of Magnetic Materials 298
Chapter 6. Magnetic Circuits and General Measuring Problems 300
6.1 Closed Magnetic Circuits 301
6.2 Open Samples 314
Chapter 7. Characterization of Soft Magnetic Materials 326
7.1 Bulk Samples, Laminations, and Ribbons: Test Specimens, Magnetizers, Measuring standards 328
7.2 Measurement of the DC Magnetization Curves and the Related Parameters 355
7.3 AC Measurements 381
Chapter 8. Characterization of Hard Magnets 494
8.1 Closed Magnetic Circuit Measurements 500
8.2 Open Sample Measurements 518
Chapter 9. Measurement of Intrinsic Magnetic Properties of Ferromagnets 568
9.1 Spontaneous Magnetization and Curie Temperature 568
9.2 Magnetic Anisotropy 583
Chapter 10. Uncertainty and Confidence in Measurements 600
10.1 Estimate of a Measurand Value and Measuring Uncertainty 600
10.2 Combined Uncertainty 605
10.3 Expanded Uncertainty and Confidence Level. Weighted Uncertainty 608
10.4 Traceability and Uncertainty in Magnetic Measurements 614
Appendix A: The SI and the CGS Unit Systems in Magnetism 632
Appendix B: Physical Constants 640
Appendix C: Evaluation of Measuring Uncertainty 642
Appendix D: Specifications of Magnetometers 648
List of Symbols 650
Subject Index 654

Erscheint lt. Verlag 7.12.2004
Mitarbeit Herausgeber (Serie): Isaak D. Mayergoyz
Sprache englisch
Themenwelt Sachbuch/Ratgeber
Naturwissenschaften Physik / Astronomie Elektrodynamik
Technik Elektrotechnik / Energietechnik
Technik Maschinenbau
ISBN-10 0-08-052892-9 / 0080528929
ISBN-13 978-0-08-052892-2 / 9780080528922
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