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    • 9. 发明授权
    • Magnetic device to reduce reversal current in current-driven magnetic reversal and magnetic memory using same
    • 磁性装置可减少电流驱动磁反转和磁存储器中的反转电流
    • US07486486B2
    • 2009-02-03
    • US10954099
    • 2004-09-30
    • Shiho NakamuraShigeru Haneda
    • Shiho NakamuraShigeru Haneda
    • G11B5/127
    • G11C11/15G11B5/1276
    • A magnetic device includes a first ferromagnetic layer in which magnetic layers and one or more nonmagnetic layers are alternately stacked, a second ferromagnetic layer having magnetization substantially fixed to a second direction, a third ferromagnetic layer provided between the first and second ferromagnetic layers and having a variable direction of magnetization, and a couple of electrodes configured to provide write current between the first and second ferromagnetic layers so that the direction of magnetization of the third ferromagnetic layer is determined depending on a direction of the current. At least one layer of the magnetic layers has magnetization substantially fixed to a first direction. Two or more layers of the magnetic layers are ferromagnetically coupled via the nonmagnetic layers. The ferromagnetic coupling has a strength such that a parallel magnetic alignment of the magnetic layers is maintained when the write current is passed.
    • 磁性装置包括第一铁磁层,其中磁性层和一个或多个非磁性层交替堆叠,具有基本上固定在第二方向上的磁化的第二铁磁层;设置在第一和第二铁磁层之间的第三铁磁层, 可变磁化方向,以及配置成在第一和第二铁磁层之间提供写入电流的一对电极,使得第三铁磁层的磁化方向根据电流的方向来确定。 至少一层磁性层具有大致固定在第一方向上的磁化。 两层或多层磁性层通过非磁性层铁磁耦合。 铁磁耦合具有这样的强度,使得当写入电流通过时,保持磁性层的平行磁性取向。
    • 10. 发明授权
    • Magnetic cell and magnetic memory
    • 磁性细胞和磁记忆
    • US07126849B2
    • 2006-10-24
    • US11227493
    • 2005-09-16
    • Shiho NakamuraShigeru HanedaYuichi Ohsawa
    • Shiho NakamuraShigeru HanedaYuichi Ohsawa
    • G11C11/14
    • H01L43/08G11C11/15G11C11/16G11C11/5607H01L27/224H01L27/228
    • A magnetic cell includes: a first ferromagnetic layer whose magnetization is substantially fixed in a first direction; a second ferromagnetic layer whose magnetization is substantially fixed in a second direction opposite to the first direction; a third ferromagnetic layer provided between the first and the second ferromagnetic layers, a direction of magnetization of the third ferromagnetic layer being variable; a first intermediate layer provided between the first and the third ferromagnetic layers; and a second intermediate layer provided between the second and the third ferromagnetic layers. The direction of magnetization of the third ferromagnetic layer can be determined under an influence of spin-polarized electrons upon the third ferromagnetic layer by passing a current between the first and the second ferromagnetic layers.
    • 磁性电池包括:第一铁磁层,其磁化基本上固定在第一方向上; 第二铁磁层,其磁化基本上固定在与第一方向相反的第二方向上; 设置在所述第一和第二铁磁层之间的第三铁磁层,所述第三铁磁层的磁化方向是可变的; 设置在第一和第三铁磁层之间的第一中间层; 以及设置在第二和第三铁磁层之间的第二中间层。 可以通过在第一和第二铁磁层之间通过电流,在自旋极化电子对第三铁磁层的影响下确定第三铁磁层的磁化方向。