Title:
FERROMAGNETIC TUNNEL JUNCTION STRUCTURE AND MAGNETORESISTIVE ELEMENT USING SAME
Document Type and Number:
WIPO Patent Application WO/2010/134435
Kind Code:
A1
Abstract:
Provided is a ferromagnetic tunnel junction structure characterized by using an MgO barrier and using a Co2FeAl full-Heusler alloy as any of ferromagnetic layers. The ferromagnetic tunnel junction structure is further characterized in that the Co2FeAl especially comprises a B2 structure and one of the ferromagnetic layers has been formed on a chromium buffer layer. Also provided is a magnetoresistive element characterized by including a ferromagnetic tunnel junction structure, the ferromagnetic tunnel junction structure being any of these ferromagnetic tunnel junction structures. Thus, a high TMR, in particular, a TMR exceeding 100% at room temperature, can be attained with the Co2FeAl, which has the smallest α although not a half-metal.
Inventors:
INOMATA Koichiro (2-1 Sengen 1-chome, Tsukuba-sh, Ibaraki 47, 〒3050047, JP)
猪俣 浩一郎 (〒47 茨城県つくば市千現一丁目２番地１ 独立行政法人物質・材料研究機構内 Ibaraki, 〒3050047, JP)
WANG Wenhong (2-1 Sengen 1-chome, Tsukuba-sh, Ibaraki 47, 〒3050047, JP)
猪俣 浩一郎 (〒47 茨城県つくば市千現一丁目２番地１ 独立行政法人物質・材料研究機構内 Ibaraki, 〒3050047, JP)
WANG Wenhong (2-1 Sengen 1-chome, Tsukuba-sh, Ibaraki 47, 〒3050047, JP)
Application Number:
JP2010/057833
Publication Date:
November 25, 2010
Filing Date:
May 07, 2010
Export Citation:
Assignee:
NATIONAL INSTITUTE FOR MATERIALS SCIENCE (2-1 Sengen 1-chome, Tsukuba-shi Ibaraki, 47, 〒3050047, JP)
独立行政法人物質・材料研究機構 (〒47 茨城県つくば市千現一丁目２番地１ Ibaraki, 〒3050047, JP)
INOMATA Koichiro (2-1 Sengen 1-chome, Tsukuba-sh, Ibaraki 47, 〒3050047, JP)
猪俣 浩一郎 (〒47 茨城県つくば市千現一丁目２番地１ 独立行政法人物質・材料研究機構内 Ibaraki, 〒3050047, JP)
独立行政法人物質・材料研究機構 (〒47 茨城県つくば市千現一丁目２番地１ Ibaraki, 〒3050047, JP)
INOMATA Koichiro (2-1 Sengen 1-chome, Tsukuba-sh, Ibaraki 47, 〒3050047, JP)
猪俣 浩一郎 (〒47 茨城県つくば市千現一丁目２番地１ 独立行政法人物質・材料研究機構内 Ibaraki, 〒3050047, JP)
International Classes:
H01L43/08; G01R33/09; G11B5/39; H01F10/16; H01F10/32; H01L21/8246; H01L27/105; H01L43/10
Attorney, Agent or Firm:
NISHIZAWA Toshio (Kudan-Horie Bldg. 6F, 3-14 Kudan-kita 4-chome, Chiyoda-k, Tokyo 73, 〒1020073, JP)
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Claims:
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