The development of new materials is essential to raise the performance and functions of magnetic devices. At present (Fe, Co, Ni)-based alloys are still used mainly; however, they are going to be insufficient for the future progress. Many of ordered alloys are known to show good properties and high potential as the materials for magnetic devices. Mn-based ordered alloys have already been used for spin-valve heads in hard disk drives, and have been still investigated for magnetic random access memories. L10 ordered FePt and FePd alloys with high magnetic anisotropy have recently attracted much attention for the application to ultra-high density magnetic recording media. Some of Heusler alloys, which show half metallic properties with 100% spin polarization of conduction electrons, introduce high magnetoresistance ratios, and thus they are anticipated to realize spin electronic devices. This special issue includes the papers on (1) fundamental properties, (2) the present status of research and development, and (3) the problems for practical application, of magnetic ordered alloys.
(Received ; Accepted ; Published )
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© 2002 The Japan Institute of Metals
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