Nanomagnetism

The NATO Advanced Research Workshop on "Nanomagnetic Devices" was held in Miraflores de la Sierra, Madrid, Spain, from 14 to 19 September 1992. This book contains 21 invited articles related to suggestive and relevant aspects of Magnetism. The NATO Advanced Research Workshop was Co-directed by R. C. O'Handley, B. Heinrich and A. Hernando. The organisers as well as the participants are gratefully acknowledged to the NATO Science Committee. I also wish to thank the publishers for their advice and help in organizing the book. xi DESIDERATA OF STORAGE DEVICES C. E. YEACK-SCRANTON IBM Corporation, E02/005 5600 Cottle Road San Jose, CA 95139 USA ABSTRACT. Typical requirements on cost, capacity, and performance of today's magnetic storage devices and industry trends in these attributes are given. Scaling components, devices, and materials is shown to be a key factor in further improvement, Challenges to continued scaling are reviewed, particularly as they relate to magnetic nano-structures, materials, and characterization techniques.

I. Introduction to Nanomagnetic Devices. - "Desiderata of Storage Devices". - "Bloch-Line Storage Potential". - "Time-Resolved Experiments in Magnetism". - "Nanocrystalline Materials as the Magnetic Core in High-Performance Fluxgate Sensors". - II. Thin Films. - "FMR and Smoke Studies of Bilinears and Biquadratic Exchange Coupling in BCC Fe/Cu, Ag/Fe Trilayers. The effect of in-plane four-fold anisotropies on Magnetization reversal". - "The Ruderman-Kittel-Kasuya-Yosida Spin Polarization in Finite Systems: Long Range Antiferromagnetic Polarization". - "Interlayer Coupling and its Dependence on Growth and Structure". - "Origins of Hysteresis in Ultra Thin Films". - III. Small Particles. Clusters and Nanocrystal. - "Fine Particle Synthesis by Spark Erosion". - "Studies of Superparamagnetism in Samples of Ultrafine Particles". - "Magnetism on Nanocrystalline Materials". - "Nanocrystalline Soft Magnetic Materials". - "Basic Magnetic Properties of Nanocrystalline Particles and Particle Ensembles". - "Variety of Magnetic Phases in Nano crystalline Fe-based Metallic Glasses". - IV. Tunneling Effects. - "Quantum Tunneling of Magnetization". - "Mesoscopic Quantum Tunneling in Amorphous Magnets with Strom Random-Axis Anisotropy". - V. Magnetostriction. - "The Effect of Domain Structure on Magnetostrictive Response in Amorphous Ferromagnets". - "Co-P Layers and Multilayers Produced by Electrolytical Deposition: Structure, Magnetic and Magnetoelastic Properties". - "Sensors Based on Amorphous Alloys". - "Permeability and Domain Structures in Soft Nanocrytalline Materials". - "Characterisation of the Amorphous State of Fe73. 5Cu1Nb3Si13. 5B9".