FERROMAGNETIC TUNNEL JUNCTION ELEMENT

WIPO Patent Application WO/2011/099476

A1

Disclosed is a ferromagnetic tunnel junction element which can perform current-induced magnetization reversal with a low drive current value. The ferromagnetic tunnel junction element (10) has a magnetization fixed layer (100), a nonmagnetic insulating layer (110), and a magnetization free layer (120). The magnetization free layer (120) has ferromagnetic layers (220, 222) with a nonmagnetic metal layer (221) therebetween, and the magnetization directions of the two ferromagnetic layers (220, 222) are parallel to each other. A spin transfer torque effectively operates by having the magnetization directions of the two ferromagnetic layers parallel to each other, and a drive current can be reduced.

ICHIMURA Masahiko (HITACHI LTD., 2520, Akanuma, Hatoyama-machi, Hiki-gu, Saitama 95, 〒3500395, JP)
市村　雅彦 (〒95 埼玉県比企郡鳩山町赤沼２５２０番地　株式会社日立製作所　基礎研究所内 Saitama, 〒3500395, JP)
SUGANO Ryoko (HITACHI LTD., 2520, Akanuma, Hatoyama-machi, Hiki-gu, Saitama 95, 〒3500395, JP)
菅野　量子 (〒95 埼玉県比企郡鳩山町赤沼２５２０番地　株式会社日立製作所　基礎研究所内 Saitama, 〒3500395, JP)

JP2011/052624

August 18, 2011

February 08, 2011

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HITACHI, LTD. (6-6 Marunouchi 1-chome, Chiyoda-ku Tokyo, 80, 〒1008280, JP)
株式会社日立製作所 (〒80 東京都千代田区丸の内一丁目６番６号 Tokyo, 〒1008280, JP)
ICHIMURA Masahiko (HITACHI LTD., 2520, Akanuma, Hatoyama-machi, Hiki-gu, Saitama 95, 〒3500395, JP)
市村　雅彦 (〒95 埼玉県比企郡鳩山町赤沼２５２０番地　株式会社日立製作所　基礎研究所内 Saitama, 〒3500395, JP)
SUGANO Ryoko (HITACHI LTD., 2520, Akanuma, Hatoyama-machi, Hiki-gu, Saitama 95, 〒3500395, JP)

H01L21/8246; G11C11/15; H01L27/105; H01L29/82; H01L43/08

POLAIRE I.P.C. (7-1 Hatchobori 2-chome, Chuo-ku Tokyo, 32, 〒1040032, JP)

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