Title:
TITANIUM DIOXIDE COBALT MAGNETIC FILM AND ITS MANUFACTURING METHOD
Document Type and Number:
WIPO Patent Application WO/2002/018668
Kind Code:
A1
Abstract:
A photocatalyst having a high catalyst ability, a semiconductor material having optical, electrical, and magnetic functions, and a titanium dioxide cobalt magnetic film useful for a transparent magnet are disclosed. The titanium dioxide cobalt magnetic film has a composition expressed by the formula: Ti¿1-x?Co¿x?O¿2? (where o < x ≤ = 0.3), contains Co substituted at the Ti lattice position, and is formed by epitaxial growth on a single crystal substrate. The crystal structure is the anatase structure or the rutile structure. The band gap energy varies within a range of 3.13 to 3.33 eV with the concentration of Co substituted at the Ti lattice position. The magnetization is kept even over the room temperature. The film is transparent to the visible light. The titanium dioxide cobalt magnetic film is formed by irradiating a target of a mixture of TiO¿2? and Co at a predetermined ratio with a predetermined laser beam under predetermined irradiation conditions in a predetermined oxygen atmosphere in a vacuum vessel, evaporating the TiO¿2? and Co, and depositing them on a single crystal substrate heated to a predetermined substrate temperature.
Inventors:
KOINUMA HIDEOMI (JP)
MATSUMOTO YUJI (JP)
MATSUMOTO YUJI (JP)
Application Number:
PCT/JP2001/007089
Publication Date:
March 07, 2002
Filing Date:
August 17, 2001
Export Citation:
Assignee:
JAPAN SCIENCE & TECH CORP (JP)
KOINUMA HIDEOMI (JP)
MATSUMOTO YUJI (JP)
KOINUMA HIDEOMI (JP)
MATSUMOTO YUJI (JP)
International Classes:
C01G51/00; B01J23/00; B01J23/75; B01J35/00; B01J35/02; C23C14/08; C23C14/28; C30B23/02; C30B29/22; G11B5/64; G11B5/65; G11B5/84; G11B5/85; H01F1/00; H01F10/00; H01F10/16; H01F10/193; H01F10/20; H01F10/28; H01F41/20; (IPC1-7): C23C14/08; C23C14/28; B01J35/02; H01F10/20; G11B5/65; G11B5/84
Foreign References:
| US6037289A | 2000-03-14 | |||
| US5145713A | 1992-09-08 | |||
| JPH1192176A | 1999-04-06 |
Other References:
See also references of EP 1314793A4
Attorney, Agent or Firm:
Hirayama, Kazuyuki (Shinjukugyoen Bldg. 3-10 Shinjuku 2-chome Shinjuku-ku, Tokyo, JP)
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