Title:
THIN FILM RARE EARTH PERMANENT MAGNET, AND METHOD FOR MANUFACTURING THE PERMANENT MAGNET
Document Type and Number:
WIPO Patent Application WO/2002/015206
Kind Code:
A1
Abstract:
A thin film rare earth permanent magnet capable of making the thin film by vapor growth anisotropic ina lamination direction, and a method for manufacturing the permanent magnet. There are repeated a number of operations to form atomic laminate units (13) by laminating a monoatomic layer (10) of a rare earth element on a substrate (1) of a non-magnetic material having a flat smoothness and then by laminating an atomic laminate (12) of a transient metal element having a plurality of monoatomic layers (11) of a transient metal element, so that the atomic laminate units (13) of a characteristic construction are laminated in a plurality of layers. As a result, each atomic laminate (12) has an easily magnetizable axis in the laminate direction of the monoatomic layers (11), and is sandwiched between the monoatomic layers (10, 10) of the rare earth element so that an inverse magnetic domain is suppressed to establish a strong coercive force. Moreover, the content of the transient metal element to the rare earth metal is raised to improve the residual magnetic flux density drastically.
Inventors:
YAMASHITA OSAMU (JP)
MAKITA KEN (JP)
MAKITA KEN (JP)
Application Number:
PCT/JP2001/006562
Publication Date:
February 21, 2002
Filing Date:
July 30, 2001
Export Citation:
Assignee:
SUMITOMO SPEC METALS (JP)
YAMASHITA OSAMU (JP)
MAKITA KEN (JP)
YAMASHITA OSAMU (JP)
MAKITA KEN (JP)
International Classes:
C23C14/00; C23C14/16; H01F10/00; H01F10/12; H01F10/28; H01F10/32; H01F41/30; (IPC1-7): H01F10/12; H01F1/04; C23C14/14
Foreign References:
| JPH08195314A | 1996-07-30 | |||
| JPS6130017A | 1986-02-12 |
Other References:
See also references of EP 1329912A4
Attorney, Agent or Firm:
Ikejyo, Shigenobu (Fushimimachi 3-chome Chuou-ku Osaka-shi, Osaka, JP)
Download PDF: