Abstract
IN magnetic wire recording, the medium most frequently used for the recording of music is chromium-nickel austenitic stainless steel, which has been rendered ferromagnetic by drawing into fine wire. By suitable heat treatment after drawing, it has been found possible to obtain intrinsic coercivities (JHc) as high as 500 oersteds, a value so far in excess of the normal range for steels that some explanation seems required.
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References
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HOBSON, P., OSMOND, W. Ferromagnetic Structure of Cold-Worked Austenitic Stainless Steels. Nature 161, 562–563 (1948). https://doi.org/10.1038/161562b0
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DOI: https://doi.org/10.1038/161562b0
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