公开(公告)号：DE69424217D1

公开(公告)日：2000-06-08

申请号：DE69424217

申请日：1994-02-14

Applicant: IBM

Inventor： BOJARCZUK JR ,  GAMBINO RICHARD JOSEPH ,  RUF RALPH

IPC: C22C19/00 ,  C22C38/00 ,  G11B11/10 ,  G11B11/105 ,  H01F1/00 ,  H01F10/12 ,  H01F41/20

Abstract: A magneto-optic memory and a magnetic material is described incorporating a polarized light beam directed towards a magnetic material and an analyzer for intercepting the polarized light beam after passing through the magnetic material or after being reflected by the magnetic material. The magnetic material includes a matrix of metal such as iron, cobalt, nickel, and alloys thereof and a plurality of separated phases distributed in the matrix such as EuS, EuO, EuOTb, PtMnSb, MnAs, MnBi, MnSb, CrO2, CrTe, GdN, Gd4C, other compounds of a rare earth element and manganese compounds. Terbium or neodymium may be dissolved in the matrix of metal and in the plurality of separated phases. The invention overcomes the problem of providing a magnetic material having a Curie point above room temperature, a square perpendicular hysteresis loop at room temperature, a large magneto-optic rotation at the wavelength of interest and a deposition temperature suitable depositing on polymer substrates.

公开(公告)号：DE69424217T2

公开(公告)日：2000-11-30

申请号：DE69424217

申请日：1994-02-14

Applicant: IBM

Inventor： BOJARCZUK JR ,  GAMBINO RICHARD JOSEPH ,  RUF RALPH

IPC: C22C19/00 ,  C22C38/00 ,  G11B11/10 ,  G11B11/105 ,  H01F1/00 ,  H01F10/12 ,  H01F41/20

Abstract: A magneto-optic memory and a magnetic material is described incorporating a polarized light beam directed towards a magnetic material and an analyzer for intercepting the polarized light beam after passing through the magnetic material or after being reflected by the magnetic material. The magnetic material includes a matrix of metal such as iron, cobalt, nickel, and alloys thereof and a plurality of separated phases distributed in the matrix such as EuS, EuO, EuOTb, PtMnSb, MnAs, MnBi, MnSb, CrO2, CrTe, GdN, Gd4C, other compounds of a rare earth element and manganese compounds. Terbium or neodymium may be dissolved in the matrix of metal and in the plurality of separated phases. The invention overcomes the problem of providing a magnetic material having a Curie point above room temperature, a square perpendicular hysteresis loop at room temperature, a large magneto-optic rotation at the wavelength of interest and a deposition temperature suitable depositing on polymer substrates.