New developments in technologically important magnetic materials |
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Authors: | G.Y. Chin |
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Affiliation: | Bell Laboratories, Murray Hill, NJ 07974, USA |
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Abstract: | In the past decade there has been a number of new developments in magnetic materials that should pave the way for expanded applications. These include: highly oriented high induction silicon steel; new varieties of permalloys, especially near 65% Ni; amorphous soft magnetic materials of the type (Fe, Co, Ni)80 (P, B, Al)20 produced by continuous rapid quenching; rare earth-cobalt permanent magnets with iHc to 150 kA/m and (BH)max to 200 kJ/m3; ductile chromium cobalt iron permanent magnets with properties comparable to the alnicos; new families of ductile semihard magnets particularly for miniature self-latching dry reed contacts; and a new memory technology based on magnetic bubbles. These new developments will be discussed along with prospects for future applications. |
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