Elsevier, 1998. 664 p.
The Handbook series Magnetic Materials is a continuation of the Handbook series Ferromagnetic Materials. When Peter Wohlfarth started the latter series, his original aim was to combine new developments in magnetism with the achievements of earlier compilations of monographs, producing a worthy successor to Bozorth's classical and monumental book Ferromagnetism. This is the main reason that Ferromagnetic Materials was initially chosen as title for the Handbook series, although the latter aimed at giving a more complete crosssection of magnetism than Bozorth's book.
In the last few decades magnetism has seen an enormous expansion into a variety of different areas of research, comprising the magnetism of several classes of novel materials that share with truly ferromagnetic materials only the presence of magnetic moments. For this reason the Editor and Publisher of this Handbook series have carefully reconsidered the title of the Handbook series and changed it into Magnetic Materials. It is with much pleasure that I can introduce Volume 11 of this Handbook series to you now.
Over the years there has been a growing interest in intermetallic compounds based on uranium. Initially the interest was focused on binary compounds with a well-defined crystal structure, comprising compounds with a rather broad 5f band as well as compounds belonging to the class of heavy-fermion systems. All these material were reviewed in Volume 4 of this Handbook. Although there still has been some progress in binary uranium compounds most of the experimental effort has been spent on the vast mount of teary and multinary uranium systems. The reason for this is the possibility to reach a much wider variety in components while preserving the structure type. Simultaneously there has been an increasing amount of work done on well defined single crystals, often with advanced experimental methods such as photoelectron spectroscopy, inelastic neutron scattering and muon spin rotation. All these research activities have finally led to the crystallisation of new concepts in acfinide magnetism which, together with the large amount of experimental work, will be reviewed in Chapter 1 of this Volume.
The last few decades have witnessed quite an extraordinary development in magnetic recording technology. This technology continues to evolve at a rapid pace resulting in media in which more data can be stored in ever decreasing volumes. It includes audio, video and data storage applications in the form of tapes, floppy and hard disks in products such as digital video recorders, digital camera recorders, audio equipment, electronic games, video telephones, fax machines and personal organisers. In the near future magnetic recording technology will have an enormous growth potential, it's main aims including further reduction in the peripheral device sizes while maintaining an increase in capacity. Hard disks are the most prominent type of mass storage today thanks to their low cost, high speed, and relatively high storage capacity. The magnetism and materials aspects of hard disk media will be highlighted in Chapter 2 of this Volume.
Permanent magnetic materials are used as components in a wide range of industrial applications, in measuring and regulating controls and in medical equipment. Permanent magnets are also essential in devices for storing energy in a static magnetic field. Major applications involve the conversion of mechanical to electrical energy and vice versa, or the exertion of a force on soft ferromagnetic objects. The applications of permanent magnet materials in information technology are continuously growing. Important examples are voice coil motors and hard-disc drives. Permanent magnet materials have already been the subject of several chapters in previous volumes of the Handbook. Materials related to SmCo5 and Nd2Fe14B were extensively discussed in two separate chapters in Volume 4, while interstitially modified materials were reviewed in Volume
9. A more general review including magnetism and processing also of conventional magnet materials was published in Volume 10.
Magnets based on rare earth elements are unequalled with regard to coercivity and maximum energy production. There has been considerable progress in the development of rare earth based permanent magnets and this progress has gone hand in hand with a better understanding of the physical properties and especially the magnetism of the underlying class of materials. Results obtained by modem nuclear magnetic resonance techniques have contributed much to this understanding. Chapter 3 gives a survey of the physical principles involved with this technique and how these can be advantageously applied to the study of strongly ferromagnetic materials.
Inelastic neutron scattering is a powerful technique that is indispensable for in-depth studies of various types of magnetic materials. Prominent examples of how this technique has been helpful in the understanding of the magnetism of valence fluctuations and heavy fermions were already reviewed in a chapter in Volume
7. The last chapter of the present volume is devoted to inelastic neutron scattering when applied to study the crystal field interaction in lanthanide compounds. Included in this review is a description of how this technique is complimentary to various other modem and conventional techniques.
Volume 11 of the Handbook on the Properties of Magnetic Materials, as the preceding volumes, has a dual purpose. As a textbook it is intended to be of assistance to those who wish to be introduced to a given topic in the field of magnetism without the need to read the vast amount of literature published. As a work of reference it is intended for scientists active in magnetism research. To this dual purpose, Volume 11 of the Handbook is composed of topical review articles written by leading authorities. In each of these articles an extensive description is given in graphical as well as in tabular form, much emphasis being placed on the discussion of the experimental material in the framework of physics, chemistry and material science.
The task to provide the readership with novel trends and achievements in magnetism would have been extremely difficult without the professionalism of the North Holland Physics Division of Elsevier Science B.V. , and I wish to thank Jonathan Clark and Wim Spaans for their great help and expertise.
Preface to Volume 11.
Contents.
Contents of Volumes 1-10.
List of Contributors.
Magnetism of Teary Intermetallic Compounds of Uranium.
Magnetic Recording Hard Disk Thin Film Media.
Magnetism of Permanent Magnet Materials and Related Compounds as Studied by NMR.
Crystal Field Effects in Intermetallic Compounds Studied by Inelastic Neutron Scattering.
Author Index.
Subject Index.
Materials Index.
The Handbook series Magnetic Materials is a continuation of the Handbook series Ferromagnetic Materials. When Peter Wohlfarth started the latter series, his original aim was to combine new developments in magnetism with the achievements of earlier compilations of monographs, producing a worthy successor to Bozorth's classical and monumental book Ferromagnetism. This is the main reason that Ferromagnetic Materials was initially chosen as title for the Handbook series, although the latter aimed at giving a more complete crosssection of magnetism than Bozorth's book.
In the last few decades magnetism has seen an enormous expansion into a variety of different areas of research, comprising the magnetism of several classes of novel materials that share with truly ferromagnetic materials only the presence of magnetic moments. For this reason the Editor and Publisher of this Handbook series have carefully reconsidered the title of the Handbook series and changed it into Magnetic Materials. It is with much pleasure that I can introduce Volume 11 of this Handbook series to you now.
Over the years there has been a growing interest in intermetallic compounds based on uranium. Initially the interest was focused on binary compounds with a well-defined crystal structure, comprising compounds with a rather broad 5f band as well as compounds belonging to the class of heavy-fermion systems. All these material were reviewed in Volume 4 of this Handbook. Although there still has been some progress in binary uranium compounds most of the experimental effort has been spent on the vast mount of teary and multinary uranium systems. The reason for this is the possibility to reach a much wider variety in components while preserving the structure type. Simultaneously there has been an increasing amount of work done on well defined single crystals, often with advanced experimental methods such as photoelectron spectroscopy, inelastic neutron scattering and muon spin rotation. All these research activities have finally led to the crystallisation of new concepts in acfinide magnetism which, together with the large amount of experimental work, will be reviewed in Chapter 1 of this Volume.
The last few decades have witnessed quite an extraordinary development in magnetic recording technology. This technology continues to evolve at a rapid pace resulting in media in which more data can be stored in ever decreasing volumes. It includes audio, video and data storage applications in the form of tapes, floppy and hard disks in products such as digital video recorders, digital camera recorders, audio equipment, electronic games, video telephones, fax machines and personal organisers. In the near future magnetic recording technology will have an enormous growth potential, it's main aims including further reduction in the peripheral device sizes while maintaining an increase in capacity. Hard disks are the most prominent type of mass storage today thanks to their low cost, high speed, and relatively high storage capacity. The magnetism and materials aspects of hard disk media will be highlighted in Chapter 2 of this Volume.
Permanent magnetic materials are used as components in a wide range of industrial applications, in measuring and regulating controls and in medical equipment. Permanent magnets are also essential in devices for storing energy in a static magnetic field. Major applications involve the conversion of mechanical to electrical energy and vice versa, or the exertion of a force on soft ferromagnetic objects. The applications of permanent magnet materials in information technology are continuously growing. Important examples are voice coil motors and hard-disc drives. Permanent magnet materials have already been the subject of several chapters in previous volumes of the Handbook. Materials related to SmCo5 and Nd2Fe14B were extensively discussed in two separate chapters in Volume 4, while interstitially modified materials were reviewed in Volume
9. A more general review including magnetism and processing also of conventional magnet materials was published in Volume 10.
Magnets based on rare earth elements are unequalled with regard to coercivity and maximum energy production. There has been considerable progress in the development of rare earth based permanent magnets and this progress has gone hand in hand with a better understanding of the physical properties and especially the magnetism of the underlying class of materials. Results obtained by modem nuclear magnetic resonance techniques have contributed much to this understanding. Chapter 3 gives a survey of the physical principles involved with this technique and how these can be advantageously applied to the study of strongly ferromagnetic materials.
Inelastic neutron scattering is a powerful technique that is indispensable for in-depth studies of various types of magnetic materials. Prominent examples of how this technique has been helpful in the understanding of the magnetism of valence fluctuations and heavy fermions were already reviewed in a chapter in Volume
7. The last chapter of the present volume is devoted to inelastic neutron scattering when applied to study the crystal field interaction in lanthanide compounds. Included in this review is a description of how this technique is complimentary to various other modem and conventional techniques.
Volume 11 of the Handbook on the Properties of Magnetic Materials, as the preceding volumes, has a dual purpose. As a textbook it is intended to be of assistance to those who wish to be introduced to a given topic in the field of magnetism without the need to read the vast amount of literature published. As a work of reference it is intended for scientists active in magnetism research. To this dual purpose, Volume 11 of the Handbook is composed of topical review articles written by leading authorities. In each of these articles an extensive description is given in graphical as well as in tabular form, much emphasis being placed on the discussion of the experimental material in the framework of physics, chemistry and material science.
The task to provide the readership with novel trends and achievements in magnetism would have been extremely difficult without the professionalism of the North Holland Physics Division of Elsevier Science B.V. , and I wish to thank Jonathan Clark and Wim Spaans for their great help and expertise.
Preface to Volume 11.
Contents.
Contents of Volumes 1-10.
List of Contributors.
Magnetism of Teary Intermetallic Compounds of Uranium.
Magnetic Recording Hard Disk Thin Film Media.
Magnetism of Permanent Magnet Materials and Related Compounds as Studied by NMR.
Crystal Field Effects in Intermetallic Compounds Studied by Inelastic Neutron Scattering.
Author Index.
Subject Index.
Materials Index.