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公开(公告)号：US3620841A
公开(公告)日：1971-11-16
申请号：US3620841D
申请日：1970-02-16
Applicant: IBM
Inventor： COMSTOCK RICHARD LAWRENCE , MOORE EUGENE B
CPC classification number: H01F10/20
Abstract: A continuous magnetite film, suitable for magnetic recording, is prepared by forming a film of amorphous Fe2O3, heating the Fe2O3 until it is completely converted to the alpha crystalline phase, and then reducing it to magnetite.
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