Title:
磁化方向制御方法、及びそれを応用したMRAM
Document Type and Number:
Japanese Patent JP4877506
Kind Code:
B2
Abstract:
A magnetization direction control method for controlling magnetization directions of first to third ferromagnetic layers ( 11 - 13 ) within a synthetic antiferromagnet structure ( 10 A) having the first to the third ferromagnetic layers ( 11 - 13 ) and first and second non-magnetic layers ( 21, 22 ) interposed therebetween, without coupling antiferromagnetic material. The magnetization direction control method is composed of steps of (a) applying an external magnetic field HE to the synthetic antiferromagnet structure ( 10 A) so as to direct the magnetizations of the first to third ferromagnetic layers in the same direction, and (b) reducing the external magnetic field to reverse the magnetization of one or some of the first to third ferromagnetic layers ( 11 - 13 ). The synthetic antiferromagnet structure ( 10 A) is configured so that the magnetization of the first ferromagnetic layer ( 11 ) is reversed more easily than magnetizations of the other ferromagnetic layers in a state in which the magnetizations of the first to third ferromagnetic layers ( 11 - 13 ) are directed in the same direction.
Inventors:
Naohiko Sugibayashi
Honda Yuji
Noboru Sakimura
Honda Yuji
Noboru Sakimura
Application Number:
JP2006512003A
Publication Date:
February 15, 2012
Filing Date:
March 24, 2005
Export Citation:
Assignee:
NEC
International Classes:
H01L27/105; G11C11/15; H01F10/32; H01F41/30; H01L21/8246; H01L43/08; H01F13/00
Domestic Patent References:
| JP2001237472A | 2001-08-31 | |||
| JP2000113418A | 2000-04-21 | |||
| JP2003197872A | 2003-07-11 | |||
| JP2003536267A | 2003-12-02 | |||
| JP2003008100A | 2003-01-10 | |||
| JP2003309305A | 2003-10-31 | |||
| JP2003016624A | 2003-01-17 | |||
| JP2002151758A | 2002-05-24 |
Attorney, Agent or Firm:
Minoru Kudo