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CPP type giant magnetoresistance device and magnetic compounds and units using the same

外国特許コード F110003632
整理番号 A241-17EP1
掲載日 2011年6月30日
出願国 欧州特許庁(EPO)
出願番号 10011433
公報番号 2267811
公報番号 2267811
出願日 平成16年1月23日(2004.1.23)
公報発行日 平成22年12月29日(2010.12.29)
公報発行日 平成25年8月28日(2013.8.28)
優先権データ
  • 20040704713 (2004.1.23) EP
  • 特願2003-024981 (2003.1.31) JP
  • 特願2003-137945 (2003.5.15) JP
発明の名称 (英語) CPP type giant magnetoresistance device and magnetic compounds and units using the same
発明の概要(英語)

Disclosed is a CPP type giant magnetoresistance device (10, 20, 50) capable of exhibiting a giant magnetoresistance effect by spin dependent current in a direction perpendicular to a film plane as well as magnetic components and units using the device. The CPP type giant magnetoresistance device has a multi-layered structure of an antiferromagnetic layer (9), a ferromagnetic fixed layer (11, 11A), a nonmagnetic conductive layer (12) and a ferromagnetic free layer (13, 13A) wherein the ferromagnetic free layer (13, 13A) has a first magnetic layer (14, 14A) and a second magnetic layer (16, 16A) magnetically coupled together antiparallel to each other via a magnetic coupler (15, 15A) and formed to have different magnitudes of magnetization (17, 17'

18, 18A) from each other.

Electrons (5) with upward spin and electrons (6) with downward spin are scattered spin-dependently according to orientations in magnetization of the ferromagnetic fixed layer (11, 11A) and the ferromagnetic free layer (13, 13A) and are allowed to trace paths (1, 2, 3, 4) whereby the CPP-GMR is increased. Also, in a CPP type giant magnetoresistance device (30) having a ferromagnetic fixed layer (11), a nonmagnetic conductive layer (12) and a ferromagnetic free layer (13A), there may be a layer (21) made of one or more of ruthenium, iridium, rhodium, rhenium and chromium between the ferromagnetic fixed layer (11) and the nonmagnetic conductive layer (12) and/or on a surface of the ferromagnetic free layer (13A).

  • 出願人(英語)
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
  • 発明者(英語)
  • INOMATA, KOUICHIRO
  • TEZUKA, NOBUKI
国際特許分類(IPC)
指定国 DE,FR,NL
参考情報 (研究プロジェクト等) CREST Creation of Nanodevices and System Based on New Physical Phenomena and Functional Principles AREA
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