公开(公告)号：DE1449803A1

公开(公告)日：1969-11-06

申请号：DE1449803

申请日：1964-12-24

Applicant: IBM

Inventor： IRVING BERTELSEN BRUCE ,  GUENTHER HOTTENROTT HANS ,  JAMES KUMP HERBERT

IPC: G11C7/00 ,  G11C11/14 ,  H01F7/06

公开(公告)号：DE1296671B

公开(公告)日：1969-06-04

申请号：DEI0028463

申请日：1965-06-28

Applicant: IBM

Inventor： JAMES KUMP HERBERT

IPC: G11C13/06 ,  H01F10/14 ,  G11B5/02

公开(公告)号：DE1296672B

公开(公告)日：1969-06-04

申请号：DEI0032270

申请日：1966-11-18

Applicant: IBM

Inventor： TE-FU CHANG PAUL ,  IRVING BERTELSEN BRUCE ,  JAMES KUMP HERBERT

IPC: G11B11/105 ,  G02F1/22

Abstract: 1,155,006. Recording and playback. INTERNATIONAL BUSINESS MACHINES CORP. 4 Nov., 1966 [19 Nov., 1965], No. 49544/66. Heading G5R. [Also in Division H3] A film of anisotropic magnetostrictive ferromagnetic material is mechanically stressed so as to rotate its anisotropy at selected data-storage locations. The film is subjected to a magnetic field of an intensity insufficient by itself to rotate the magnetic vector into a remanent direction but sufficient to do so in conjunction with the mechanical stressing, which is applied by the production of a temperature gradient in the film at the selected locations by means of a laser beam or a beam of low-energy electrons. Playback is effected by scanning with a laser beam and using the Kerr effect. The datastorage locations may be formed as discrete elements of film on a common substrate or as regions in a single film, and the film may be provided with a protective coating, e.g. of silicon monoxide.