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公开(公告)号：US09824712B2
公开(公告)日：2017-11-21
申请号：US15423600
申请日：2017-02-03
申请人： RIKEN
发明人： Naoto Nagaosa , Wataru Koshibae , Junichi Iwasaki , Masashi Kawasaki , Yoshinori Tokura , Yoshio Kaneko
CPC分类号： G11B5/74 , G11B5/02 , G11B5/65 , G11B5/738 , G11B2005/0021 , G11C11/161 , G11C11/1673 , G11C11/1675 , G11C11/18 , G11C13/04 , G11C19/0808 , G11C19/085 , G11C19/0858 , H01L43/08
摘要： A magnetic storage media which has an endurance (durability) characteristics close to an infinite number of writing times of data and a data retention (holding) characteristics close to permanency, and is ultra-high-speed writable and erasable, and a data storage device and an image storage device which apply this magnetic storage media are provided. A magnetic storage media includes a thin layer magnet and a magnetic field generating unit arranged facing a surface of the magnet, and is capable of creating or eliminating a skyrmion by applying heat energy to another surface of the magnet positioned on the opposite side of the surface of the magnet, and a skyrmion memory includes the magnetic storage media.
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公开(公告)号：US09859017B2
公开(公告)日：2018-01-02
申请号：US15450003
申请日：2017-03-05
申请人： RIKEN
发明人： Naoto Nagaosa , Wataru Koshibae , Junichi Iwasaki , Masashi Kawasaki , Yoshinori Tokura , Yoshio Kaneko
CPC分类号： G11C19/085 , G11C11/1675 , G11C11/18 , G11C19/08 , G11C19/0866 , H01L27/228 , H01L28/00 , H01L43/08
摘要： To provide a magnetic element capable of performing skyrmion transfer, a skyrmion memory to which this magnetic element is applied, and a shift register, for example, a magnetic element capable of performing skyrmion transfer is provided, the magnetic element providing a transverse transfer arrangement in which the skyrmion is transferred substantially perpendicular to a current between an upstream electrode and a downstream electrode, and including a plurality of stable positions in which the skyrmion exists more stably than in other regions of a magnet, and a skyrmion sensor that detects a position of the skyrmion.
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公开(公告)号：US09748000B2
公开(公告)日：2017-08-29
申请号：US15391860
申请日：2016-12-28
申请人： RIKEN
发明人： Naoto Nagaosa , Wataru Koshibae , Junichi Iwasaki , Masashi Kawasaki , Yoshinori Tokura , Yoshio Kaneko
CPC分类号： G11C19/085 , G11B5/65 , G11C11/16 , G11C11/1673 , G11C11/1675 , G11C11/18 , G11C19/0841 , G11C19/0858 , G11C19/0866 , H01F10/08 , H01L27/105 , H01L43/08
摘要： Provided is a skyrmion memory circuit capable of circularly transferring a magnetic element skyrmion, comprising one or more current paths in a magnet having a closed-path pattern that are provided surrounding an end region including an end portion of the magnet in a plane of the magnet with the closed-path pattern, and applying current between an outer terminal connected to an outer circumferential portion of the closed-path pattern and an inner circumference electrode connected to an inner circumferential portion of the closed-path pattern, transferring the skyrmion in a direction substantially perpendicular to the direction of the applied current, and circulating the skyrmion in the magnet with the closed-path pattern.
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公开(公告)号：US10468586B2
公开(公告)日：2019-11-05
申请号：US15894904
申请日：2018-02-12
申请人： RIKEN
发明人： Ryutaro Yoshimi , Masataka Mogi , Naoto Nagaosa , Masashi Kawasaki , Yoshinori Tokura , Wataru Koshibae
IPC分类号： H01L43/06 , H01L27/105 , H01L29/82 , G11C11/16 , H01F10/32 , H01L27/22 , H01L43/10 , H01L43/14 , H01F10/26 , H01F1/00 , G11C11/15 , G11C11/18 , G11C11/56 , H01L43/08 , H01L43/12
摘要： An electronic device is provided, including: a first drive electrode; a second drive electrode that is spaced apart from the first drive electrode; and a topological insulator that contacts both of the first drive electrode and the second drive electrode and has magnetism, wherein the topological insulator includes a first region having a first coercivity and a second region having a second coercivity that is different from the first coercivity. A fabrication method of a topological insulator is also provided, including: preparing a topological insulator having magnetism and a first coercivity; and forming a second region having a second coercivity that is different from the first coercivity by irradiating a partial region of the topological insulator with ions.
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公开(公告)号：US10141068B2
公开(公告)日：2018-11-27
申请号：US15447096
申请日：2017-03-01
申请人： RIKEN
发明人： Naoto Nagaosa , Wataru Koshibae , Junichi Iwasaki , Masashi Kawasaki , Yoshinori Tokura , Yoshio Kaneko
IPC分类号： G11C19/08 , H01L27/105 , H01L29/82 , H01L41/08 , G11C11/16
摘要： A magnetic element capable of generating and erasing a skyrmion, including a magnet shaped as a thin layer and including a structure surrounded by a nonmagnetic material; a current path provided surrounding an end region including an end portion of the magnet, on one surface of the magnet; and a skyrmion sensor that detects the generation and erasing of the skyrmion. With Wm being width of the magnet and hm being height of the magnet, a size of the magnet, with the skyrmion of a diameter λ being generated, is such that 2λ>Wm>λ/2 and 2λ>hm>λ/2. With W being width of the end region in a direction parallel to the end portion of the magnet and h being height of the end region in a direction perpendicular to the end portion of the magnet, the end region is such that λ≥W>λ/4 and 2λ>h>λ/2.
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公开(公告)号：US10003010B2
公开(公告)日：2018-06-19
申请号：US15448612
申请日：2017-03-03
申请人： RIKEN
发明人： Naoto Nagaosa , Wataru Koshibae , Junichi Iwasaki , Masashi Kawasaki , Yoshinori Tokura , Yoshio Kaneko
IPC分类号： G11C11/14 , H01L43/02 , H01F7/20 , H01F10/32 , H01L43/08 , H01L27/22 , G11C11/16 , G11C19/08
CPC分类号： H01L43/02 , G11C11/14 , G11C11/161 , G11C11/1653 , G11C11/1657 , G11C11/1659 , G11C11/1673 , G11C11/1675 , G11C11/18 , G11C19/08 , G11C19/0808 , G11C19/085 , G11C19/0866 , H01F7/20 , H01F10/3254 , H01L27/105 , H01L27/222 , H01L27/228 , H01L29/82 , H01L43/06 , H01L43/08
摘要： Provided is a magnetic element capable of generating one skyrmion and erasing the one skyrmion. The magnetic element includes a magnet shaped like a substantially rectangular flat plate, an upstream electrode connected to the magnet in a width Wm direction of the magnet and made of a non-magnetic metal, a downstream electrode connected to the magnet in the width Wm direction to oppose the upstream electrode and made of a non-magnetic metal, and a skyrmion sensor configured to detect the skyrmion. Here, a width Wm of the substantially rectangular magnet is such that 3·λ>Wm≥λ, where λ denotes a diameter of the skyrmion, a length Hm of the substantially rectangular magnet is such that 2·λ>Hm≥λ, and the magnet has a notch structure at the edge between the upstream electrode and the downstream electrode.
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