Title:
FERRITE THIN FILM FOR HIGH FREQUENCY AND METHOD FOR PREPARATION THEREOF
Document Type and Number:
WIPO Patent Application WO/2002/042214
Kind Code:
A1
Abstract:
A novel thin film of Y-type hexagonal ferrite for a high frequency device having the c-axis of its crystal being oriented perpendicular to the surface of the film; and a method for preparing the thin film which comprises providing a viscous solution comprising a metal-organic composite being formed from a Fe?3+¿ ion as a primary component and, as secondary components, Ba?2+¿ ion and at least one transition metal ion selected from the group consisting of Fe?2+¿, Co?2+¿, Ni?2+¿, Zn?2+¿, Cu?2+¿ and Mn?2+¿, and in some cases, Sr?2+¿, Ca?2+¿ and Pb?2+¿, forming a film having a composition for Y-type hexagonal ferrite on a noble metal surface through the use of the viscous solution by a coating method, and firing the film at 750 ° C or higher. A thin film of Y-type hexagonal ferrite has been prepared for the first time.
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Inventors:
TAKADA JUN (JP)
FUGII TATSUO (JP)
NAKANISHI MAKOTO (JP)
FUGII TATSUO (JP)
NAKANISHI MAKOTO (JP)
Application Number:
PCT/JP2001/010193
Publication Date:
May 30, 2002
Filing Date:
November 21, 2001
Export Citation:
Assignee:
JAPAN SCIENCE & TECH CORP (JP)
TAKADA JUN (JP)
FUGII TATSUO (JP)
NAKANISHI MAKOTO (JP)
TAKADA JUN (JP)
FUGII TATSUO (JP)
NAKANISHI MAKOTO (JP)
International Classes:
C01G49/00; C23C18/12; H01F10/20; H01F41/16; (IPC1-7): C01G49/00; H01F10/20
Foreign References:
| JPS5831643B2 | 1983-07-07 | |||
| JPS58164B2 | 1983-01-05 | |||
| JPH09124322A | 1997-05-13 |
Other References:
D. AUTISSIER: "Synthesis and orientation of barium hexaferrite ceramics by magnetc alignment", JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, vol. 83, no. 1/3, 1990, pages 413 - 415, XP002909087
M. LIU ET AL.: "Preparation of La1.zSrzCo1-FeyO3-x thin films, membranes and coatings on dense and porous substrates", JOURNAL OF MATERIALS RESEARCH, vol. 10, no. 12, 1995, pages 3210 - 3221, XP002909088
M. LIU ET AL.: "Preparation of La1.zSrzCo1-FeyO3-x thin films, membranes and coatings on dense and porous substrates", JOURNAL OF MATERIALS RESEARCH, vol. 10, no. 12, 1995, pages 3210 - 3221, XP002909088
Attorney, Agent or Firm:
Nishi, Yoshiyuki (Suite 211 26-32, Nakahara 4-chome, Isogo-k, Yokohama-shi Kanagawa, JP)
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