公开(公告)号：US08120948B2

公开(公告)日：2012-02-21

申请号：US12561495

申请日：2009-09-17

申请人： Masahiko Nakayama ,  Hisanori Aikawa ,  Tsuneo Inaba ,  Kenji Tsuchida ,  Sumio Ikegawa ,  Hiroaki Yoda ,  Naoharu Shimomura

发明人： Masahiko Nakayama ,  Hisanori Aikawa ,  Tsuneo Inaba ,  Kenji Tsuchida ,  Sumio Ikegawa ,  Hiroaki Yoda ,  Naoharu Shimomura

IPC分类号： G11C11/00

CPC分类号： H01L27/228 ,  G11C11/161 ,  G11C11/1675

摘要： A data writing method for a magnetoresistive effect element of an aspect of the present invention including generating a write current in which a falling period from the start of a falling edge to the end of the falling edge is longer than a rising period from the start of a rising edge to the end of the rising edge, and flowing the write current through the magnetoresistive effect element which comprises a first magnetic layer having an invariable magnetizing direction, a second magnetic layer having a variable magnetizing direction, and a tunnel barrier layer provided between the first magnetic layer and the second magnetic layer, to change the magnetizing direction of the second magnetic layer.

摘要翻译： 一种用于本发明一个方面的磁阻效应元件的数据写入方法，包括产生写入电流，其中从下降沿开始到下降沿结束的下降周期长于从开始 上升沿到上升沿结束，并且使写入电流流过磁阻效应元件，该磁阻效应元件包括具有不变磁化方向的第一磁性层，具有可变磁化方向的第二磁性层和设置在可变磁化方向之间的隧道势垒层， 第一磁性层和第二磁性层，以改变第二磁性层的磁化方向。

公开(公告)号：US08223533B2

公开(公告)日：2012-07-17

申请号：US12556883

申请日：2009-09-10

申请人： Jyunichi Ozeki ,  Naoharu Shimomura ,  Sumio Ikegawa ,  Tadashi Kai ,  Masahiko Nakayama ,  Hisanori Aikawa ,  Tatsuya Kishi ,  Hiroaki Yoda ,  Eiji Kitagawa ,  Masatoshi Yoshikawa

发明人： Jyunichi Ozeki ,  Naoharu Shimomura ,  Sumio Ikegawa ,  Tadashi Kai ,  Masahiko Nakayama ,  Hisanori Aikawa ,  Tatsuya Kishi ,  Hiroaki Yoda ,  Eiji Kitagawa ,  Masatoshi Yoshikawa

IPC分类号： G11C11/00

CPC分类号： H01L27/228 ,  B82Y25/00 ,  G11C11/161 ,  G11C11/5607 ,  H01F10/123 ,  H01F10/3254 ,  H01F10/3277 ,  H01F10/3286 ,  H01F10/329 ,  H01L43/08

摘要： A magnetic memory includes a magnetoresistive effect device comprising: a first ferromagnetic layer that has magnetic anisotropy in a direction perpendicular to a film plane thereof; a first nonmagnetic layer that is provided on the first ferromagnetic layer; a first reference layer that is provided on the first nonmagnetic layer, has magnetic anisotropy in a direction perpendicular to a film plane thereof, has magnetization antiparallel to a magnetization direction of the first ferromagnetic layer, and has a film thickness that is 1/5.2 to 1/1.5 times as large as a film thickness of the first ferromagnetic layer in the direction perpendicular to the film plane; a second nonmagnetic layer that is provided on the first reference layer; and a storage layer that is provided on the second nonmagnetic layer, has magnetic anisotropy in a direction perpendicular to a film plane thereof, and has a magnetization direction varied by spin-polarized electrons caused by flowing the current to the magnetoresistive effect device.

摘要翻译： 磁存储器包括磁阻效应器件，包括：在垂直于其膜平面的方向上具有磁各向异性的第一铁磁层; 设置在第一铁磁层上的第一非磁性层; 设置在第一非磁性层上的第一参考层在垂直于其膜平面的方向上具有磁各向异性，具有与第一铁磁层的磁化方向反平行的磁化，并且具有1 / 5.2〜 在第一铁磁层的垂直于膜平面的方向上的膜厚度的1/15倍; 设置在第一参考层上的第二非磁性层; 并且设置在第二非磁性层上的存储层在垂直于其膜平面的方向上具有磁各向异性，并且由于使电流流向磁阻效应器而引起的由自旋极化电子变化的磁化方向。

公开(公告)号：US08530987B2

公开(公告)日：2013-09-10

申请号：US13432486

申请日：2012-03-28

申请人： Hisanori Aikawa ,  Tadashi Kai ,  Masahiko Nakayama ,  Sumio Ikegawa ,  Naoharu Shimomura ,  Eiji Kitagawa ,  Tatsuya Kishi ,  Jyunichi Ozeki ,  Hiroaki Yoda ,  Satoshi Yanagi

发明人： Hisanori Aikawa ,  Tadashi Kai ,  Masahiko Nakayama ,  Sumio Ikegawa ,  Naoharu Shimomura ,  Eiji Kitagawa ,  Tatsuya Kishi ,  Jyunichi Ozeki ,  Hiroaki Yoda ,  Satoshi Yanagi

IPC分类号： H01L29/82 ,  G11C11/02

CPC分类号： H01L43/08 ,  G11C11/161 ,  H01L27/228

摘要： A magnetic memory includes a magnetoresistive element. The magnetoresistive element includes a reference layer having an invariable magnetization direction, a storage layer having a variable magnetization direction, and a spacer layer provided between the reference layer and the storage layer. The storage layer has a multilayered structure including first and second magnetic layers, the second magnetic layer is provided between the first magnetic layer and the spacer layer and has a magnetic anisotropy energy lower than that of the first magnetic layer, and an exchange coupling constant Jex between the first magnetic layer and the second magnetic layer is not more than 5 erg/cm2.

摘要翻译： 磁存储器包括磁阻元件。 磁阻元件包括具有不变磁化方向的参考层，具有可变磁化方向的存储层和设置在参考层和存储层之间的间隔层。 存储层具有包括第一和第二磁性层的多层结构，第二磁性层设置在第一磁性层和间隔层之间，其磁各向异性能量低于第一磁性层的磁各向异性能，交换耦合常数Jex 第一磁性层和第二磁性层之间的距离不大于5erg / cm2。

公开(公告)号：US20120241884A1

公开(公告)日：2012-09-27

申请号：US13432486

申请日：2012-03-28

申请人： Hisanori AIKAWA ,  Tadashi Kai ,  Masahiko Nakayama ,  Sumio Ikegawa ,  Naoharu Shimomura ,  Eiji Kitagawa ,  Tatsuya Kishi ,  Jyunichi Ozeki ,  Hiroaki Yoda ,  Satoshi Yanagi

发明人： Hisanori AIKAWA ,  Tadashi Kai ,  Masahiko Nakayama ,  Sumio Ikegawa ,  Naoharu Shimomura ,  Eiji Kitagawa ,  Tatsuya Kishi ,  Jyunichi Ozeki ,  Hiroaki Yoda ,  Satoshi Yanagi

IPC分类号： H01L29/82

CPC分类号： H01L43/08 ,  G11C11/161 ,  H01L27/228

摘要： According to one embodiment, a magnetic memory includes a magnetoresistive element. The magnetoresistive element includes a reference layer having an invariable magnetization direction, a storage layer having a variable magnetization direction, and a spacer layer provided between the reference layer and the storage layer. The storage layer has a multilayered structure including first and second magnetic layers, the second magnetic layer is provided between the first magnetic layer and the spacer layer and has a magnetic anisotropy energy lower than that of the first magnetic layer, and an exchange coupling constant Jex between the first magnetic layer and the second magnetic layer is not more than 5 erg/cm2.

摘要翻译： 根据一个实施例，磁存储器包括磁阻元件。 磁阻元件包括具有不变磁化方向的参考层，具有可变磁化方向的存储层和设置在参考层和存储层之间的间隔层。 存储层具有包括第一和第二磁性层的多层结构，第二磁性层设置在第一磁性层和间隔层之间，其磁各向异性能量低于第一磁性层的磁各向异性能，交换耦合常数Jex 第一磁性层和第二磁性层之间的距离不大于5erg / cm2。

公开(公告)号：US08173447B2

公开(公告)日：2012-05-08

申请号：US12851275

申请日：2010-08-05

申请人： Tomomasa Ueda ,  Hisanori Aikawa ,  Masatoshi Yoshikawa ,  Naoharu Shimomura ,  Masahiko Nakayama ,  Sumio Ikegawa ,  Keiji Hosotani ,  Makoto Nagamine

发明人： Tomomasa Ueda ,  Hisanori Aikawa ,  Masatoshi Yoshikawa ,  Naoharu Shimomura ,  Masahiko Nakayama ,  Sumio Ikegawa ,  Keiji Hosotani ,  Makoto Nagamine

IPC分类号： H01L21/00 ,  H01L2/336 ,  H01L21/20 ,  H01L21/469

CPC分类号： G11C11/15 ,  H01L27/228 ,  H01L43/08

摘要： A magnetoresistive element includes: a magnetization free layer having a first plane and a second plane located on the opposite side from the first plane, and having a variable magnetization direction; a magnetization pinned layer provided on the first plane side of the magnetization free layer, and having a pinned magnetization direction; a first tunnel barrier layer provided between the magnetization free layer and the magnetization pinned layer; a second tunnel barrier layer provided on the second plane of the magnetization free layer; and a non-magnetic layer provided on a plane on the opposite side of the second tunnel barrier layer from the magnetization free layer. The magnetization direction of the magnetization free layer is variable by applying current between the magnetization pinned layer and the non-magnetic layer, and a resistance ratio between the first tunnel barrier layer and the second tunnel barrier layer is in a range of 1:0.25 to 1:4.

摘要翻译： 磁阻元件包括：无磁化层，其具有第一平面和位于与第一平面相反的一侧的第二平面，并且具有可变的磁化方向; 磁化固定层，设置在所述磁化自由层的所述第一平面侧上，并且具有钉扎磁化方向; 设置在所述磁化自由层和所述磁化固定层之间的第一隧道势垒层; 设置在无磁化层的第二平面上的第二隧道势垒层; 以及设置在与磁化自由层相反的第二隧道势垒层的相对侧上的平面上的非磁性层。 磁化自由层的磁化方向通过在磁化被钉扎层和非磁性层之间施加电流而变化，并且第一隧道势垒层和第二隧道势垒层之间的电阻比在1:0.25至 1：4。

公开(公告)号：US07894246B2

公开(公告)日：2011-02-22

申请号：US12014522

申请日：2008-01-15

申请人： Tomomasa Ueda ,  Hisanori Aikawa ,  Masatoshi Yoshikawa ,  Naoharu Shimomura ,  Masahiko Nakayama ,  Sumio Ikegawa ,  Keiji Hosotani ,  Makoto Nagamine

发明人： Tomomasa Ueda ,  Hisanori Aikawa ,  Masatoshi Yoshikawa ,  Naoharu Shimomura ,  Masahiko Nakayama ,  Sumio Ikegawa ,  Keiji Hosotani ,  Makoto Nagamine

IPC分类号： G11C11/00

CPC分类号： G11C11/15 ,  H01L27/228 ,  H01L43/08

摘要： A magnetoresistive element includes: a magnetization free layer having a first plane and a second plane located on the opposite side from the first plane, and having a variable magnetization direction; a magnetization pinned layer provided on the first plane side of the magnetization free layer, and having a pinned magnetization direction; a first tunnel barrier layer provided between the magnetization free layer and the magnetization pinned layer; a second tunnel barrier layer provided on the second plane of the magnetization free layer; and a non-magnetic layer provided on a plane on the opposite side of the second tunnel barrier layer from the magnetization free layer. The magnetization direction of the magnetization free layer is variable by applying current between the magnetization pinned layer and the non-magnetic layer, and a resistance ratio between the first tunnel barrier layer and the second tunnel barrier layer is in a range of 1:0.25 to 1:4.

摘要翻译： 磁阻元件包括：无磁化层，其具有第一平面和位于与第一平面相反的一侧的第二平面，并且具有可变的磁化方向; 磁化固定层，设置在所述磁化自由层的所述第一平面侧上，并且具有钉扎磁化方向; 设置在所述磁化自由层和所述磁化固定层之间的第一隧道势垒层; 设置在无磁化层的第二平面上的第二隧道势垒层; 以及设置在与磁化自由层相反的第二隧道势垒层的相对侧上的平面上的非磁性层。 磁化自由层的磁化方向通过在磁化被钉扎层和非磁性层之间施加电流而变化，并且第一隧道势垒层和第二隧道势垒层之间的电阻比在1:0.25至 1：4。

公开(公告)号：US20100315864A1

公开(公告)日：2010-12-16

申请号：US12851275

申请日：2010-08-05

申请人： Tomomasa UEDA ,  Hisanori Aikawa ,  Masatoshi Yoshikawa ,  Naoharu Shimomura ,  Masahiko Nakayama ,  Sumio Ikegawa ,  Keiji Hosotani ,  Makoto Nagamine

发明人： Tomomasa UEDA ,  Hisanori Aikawa ,  Masatoshi Yoshikawa ,  Naoharu Shimomura ,  Masahiko Nakayama ,  Sumio Ikegawa ,  Keiji Hosotani ,  Makoto Nagamine

IPC分类号： G11C11/00 ,  H01L21/02 ,  H01L29/82

CPC分类号： G11C11/15 ,  H01L27/228 ,  H01L43/08

摘要： A magnetoresistive element includes: a magnetization free layer having a first plane and a second plane located on the opposite side from the first plane, and having a variable magnetization direction; a magnetization pinned layer provided on the first plane side of the magnetization free layer, and having a pinned magnetization direction; a first tunnel barrier layer provided between the magnetization free layer and the magnetization pinned layer; a second tunnel barrier layer provided on the second plane of the magnetization free layer; and a non-magnetic layer provided on a plane on the opposite side of the second tunnel barrier layer from the magnetization free layer. The magnetization direction of the magnetization free layer is variable by applying current between the magnetization pinned layer and the non-magnetic layer, and a resistance ratio between the first tunnel barrier layer and the second tunnel barrier layer is in a range of 1:0.25 to 1:4.

摘要翻译： 磁阻元件包括：无磁化层，其具有第一平面和位于与第一平面相反的一侧的第二平面，并且具有可变的磁化方向; 磁化固定层，设置在所述磁化自由层的所述第一平面侧上，并且具有钉扎磁化方向; 设置在所述磁化自由层和所述磁化固定层之间的第一隧道势垒层; 设置在无磁化层的第二平面上的第二隧道势垒层; 以及设置在与磁化自由层相反的第二隧道势垒层的相对侧上的平面上的非磁性层。 磁化自由层的磁化方向通过在磁化被钉扎层和非磁性层之间施加电流而变化，并且第一隧道势垒层和第二隧道势垒层之间的电阻比在1:0.25至 1：4。

公开(公告)号：US08878321B2

公开(公告)日：2014-11-04

申请号：US13618410

申请日：2012-09-14

申请人： Hisanori Aikawa ,  Hiroaki Yoda ,  Masahiko Nakayama ,  Tatsuya Kishi ,  Sumio Ikegawa

发明人： Hisanori Aikawa ,  Hiroaki Yoda ,  Masahiko Nakayama ,  Tatsuya Kishi ,  Sumio Ikegawa

IPC分类号： H01L29/82 ,  H01L21/8246 ,  H01L43/08 ,  H01L43/12 ,  H01L27/22

CPC分类号： H01L43/12 ,  H01L27/228 ,  H01L43/08

摘要： According to one embodiment, a magnetoresistive element comprises a first magnetic layer, in which a magnetization direction is variable and is perpendicular to a film surface, a tunnel barrier layer that is formed on the first magnetic layer, and a second magnetic layer that is formed on the tunnel barrier layer, a magnetization direction of the second magnetic layer being variable and being perpendicular to the film surface. The second magnetic layer comprises a body layer that constitutes an origin of perpendicular magnetic anisotropy, and an interface layer that is formed between the body layer and the tunnel barrier layer. The interface layer has a permeability higher than that of the body layer and a planar size larger than that of the body layer.

摘要翻译： 根据一个实施例，磁阻元件包括其中磁化方向可变并且垂直于膜表面的第一磁性层，形成在第一磁性层上的隧道势垒层和形成的第二磁性层 在隧道势垒层上，第二磁性层的磁化方向是可变的并垂直于膜表面。 第二磁性层包括构成垂直磁各向异性的原点的主体层以及形成在主体层与隧道势垒层之间的界面层。 界面层的透过率比体层高，平面尺寸比体层大。

公开(公告)号：US08378437B2

公开(公告)日：2013-02-19

申请号：US12248484

申请日：2008-10-09

申请人： Masahiko Nakayama ,  Kay Yakushiji ,  Sumio Ikegawa ,  Shinji Yuasa ,  Tadashi Kai ,  Toshihiko Nagase ,  Minoru Amano ,  Hisanori Aikawa ,  Tatsuya Kishi ,  Hiroaki Yoda

发明人： Masahiko Nakayama ,  Kay Yakushiji ,  Sumio Ikegawa ,  Shinji Yuasa ,  Tadashi Kai ,  Toshihiko Nagase ,  Minoru Amano ,  Hisanori Aikawa ,  Tatsuya Kishi ,  Hiroaki Yoda

IPC分类号： H01L29/82

CPC分类号： H01L27/228 ,  B82Y25/00 ,  G11C11/15 ,  G11C11/1659 ,  G11C11/1675 ,  H01F10/123 ,  H01F10/325 ,  H01F10/3254 ,  H01F10/3286 ,  H01L43/08

摘要： A magnetoresistive effect element includes a reference layer, a recording layer, and a nonmagnetic layer. The reference layer is made of a magnetic material, has an invariable magnetization which is perpendicular to a film surface. The recording layer is made of a magnetic material, has a variable magnetization which is perpendicular to the film surface. The nonmagnetic layer is arranged between the reference layer and the recording layer. A critical diameter which is determined by magnetic anisotropy, saturation magnetization, and switched connection of the recording layer and has a single-domain state as a unique stable state or a critical diameter which has a single-domain state as a unique stable state and is inverted while keeping the single-domain state in an inverting process is larger than an element diameter of the magnetoresistive effect element.

摘要翻译： 磁阻效应元件包括参考层，记录层和非磁性层。 参考层由磁性材料制成，具有垂直于膜表面的不变磁化。 记录层由磁性材料制成，具有垂直于膜表面的可变磁化强度。 非磁性层布置在参考层和记录层之间。 临界直径由磁各向异性，饱和磁化强度和记录层的开关连接确定，并且具有作为独特稳定状态的单畴状态或具有单域状态作为唯一稳定状态的临界直径，并且是 在反转过程中保持单畴状态的反转大于磁阻效应元件的元件直径。

公开(公告)号：US08531875B2

公开(公告)日：2013-09-10

申请号：US13426139

申请日：2012-03-21

申请人： Satoshi Yanagi ,  Eiji Kitagawa ,  Masahiko Nakayama ,  Jyunichi Ozeki ,  Hisanori Aikawa ,  Naoharu Shimomura ,  Masatoshi Yoshikawa ,  Minoru Amano ,  Shigeki Takahashi ,  Hiroaki Yoda

发明人： Satoshi Yanagi ,  Eiji Kitagawa ,  Masahiko Nakayama ,  Jyunichi Ozeki ,  Hisanori Aikawa ,  Naoharu Shimomura ,  Masatoshi Yoshikawa ,  Minoru Amano ,  Shigeki Takahashi ,  Hiroaki Yoda

IPC分类号： H01L29/82 ,  G11C11/15

CPC分类号： H01L27/228 ,  B82Y25/00 ,  G11C11/161 ,  H01F10/3254 ,  H01F10/3286 ,  H01L43/08

摘要： According to one embodiment, a magnetic memory includes at least one memory cell including a magnetoresistive element, and first and second electrodes. The element includes a first magnetic layer, a tunnel barrier layer, a second magnetic layer, and a third magnetic layer provided on the second magnetic layer and having a magnetization antiparallel to the magnetization direction of the second magnetic layer. A diameter of an upper surface of the first magnetic layer is smaller than that of a lower surface of the tunnel barrier layer. A diameter of a lower surface of the second magnetic layer is not more than that of an upper surface of the tunnel barrier layer.

摘要翻译： 根据一个实施例，磁存储器包括至少一个包括磁阻元件的存储单元以及第一和第二电极。 元件包括第一磁性层，隧道势垒层，第二磁性层和设置在第二磁性层上并且具有与第二磁性层的磁化方向反平行的磁化的第三磁性层。 第一磁性层的上表面的直径小于隧道势垒层的下表面的直径。 第二磁性层的下表面的直径不大于隧道势垒层的上表面的直径。