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Title:
MAGNETORESISTANCE EFFECT ELEMENT AND MAGNETIC MEMORY UNIT
Document Type and Number:
WIPO Patent Application WO/2004/013919
Kind Code:
A1
Abstract:
A magnetoresistance effect element having good magnetic characteristics by preventing a deterioration, by heat treating, in a reluctance change rate, and a magnetic memory unit provided with this magnetoresistance effect element to provide excellent writing characteristics. A magnetoresistance effect element (1) comprising a pair of ferromagnetic layers (magnetization fixed layer (5) and magnetization free layer (7)) facing each other via an intermediate layer (6) to allow a reluctance to be changed by running a current perpendicularly to a film surface, at least one of the pair of ferromagnetic layers (5, 7) containing an amorphous ferromagnetic material having a crystallizing temperature of at least 623 K; and a magnetic memory unit comprising this magnetoresistance effect element (1) and bit lines and word lines sandwiching the magnetoresistance effect element (1) in a thickness direction.

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Inventors:
OBA KAZUHIRO (JP)
KANO HIROSHI (JP)
HOSOMI MASANORI (JP)
BESSHO KAZUHIRO (JP)
YAMAMOTO TETSUYA (JP)
MIZUGUCHI TETSUYA (JP)
Application Number:
PCT/JP2003/009825
Publication Date:
February 12, 2004
Filing Date:
August 01, 2003
Export Citation:
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Assignee:
SONY CORP (JP)
OBA KAZUHIRO (JP)
KANO HIROSHI (JP)
HOSOMI MASANORI (JP)
BESSHO KAZUHIRO (JP)
YAMAMOTO TETSUYA (JP)
MIZUGUCHI TETSUYA (JP)
International Classes:
G01R33/09; G11C11/15; G11C11/16; H01F10/13; H01F10/32; H01L21/8246; H01L27/105; H01L27/22; H01L43/08; H01L43/10; (IPC1-7): H01L43/08; H01L27/105; G11B5/39; G01R33/09; H01F10/13; H01F10/32
Foreign References:
JPH08203035A1996-08-09
JP2002204004A2002-07-19
JP2002208120A2002-07-26
EP1202357A22002-05-02
JPH11353619A1999-12-24
JP2003158312A2003-05-30
EP1061592A22000-12-20
Other References:
JOURNAL OF APPLIED PHYSICS, vol. 91, no. 3, pages 1701
See also references of EP 1526588A4
Attorney, Agent or Firm:
Tsunoda, Yoshisue (8-1 Nishishinjuku 1-chom, Shinjuku-ku Tokyo, JP)
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