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    • 1. 发明授权
    • Gradientless propulsion of magnetic bubble domains using modulated
in-plane fields
    • 使用调制的平面场中的无磁性推进气泡域
    • US4118793A
    • 1978-10-03
    • US758887
    • 1977-01-12
    • Bernell Edwin ArgylePieter DekkerJohn Casimir Slonczewski
    • Bernell Edwin ArgylePieter DekkerJohn Casimir Slonczewski
    • G11C11/14G11C19/08
    • G11C19/0825
    • Magnetic bubble domains are propagated in a magnetic medium in a desired direction using in-plane magnetic fields which are time varying but which have no spatial gradients. In applications such as information storage, the need for conventional propagation structures, such as offset conductor loops, patterned magnetic elements, and patterned ion implantation regions is reduced. Bubble domains having unwinding pairs of Bloch lines in their wall magnetization can be moved by applying appropriate in-plane magnetic fields, without the need for spatial gradients or variations in the magnetic field normal to the plane of the magnetic medium. The continuous movement of these bubble domains occurs by a cyclic process where the Bloch lines switch between two configurations, in an asymmetric way in response to the time varying in-plane field.
    • 磁场区域在磁性介质中以期望的方向传播,使用时变的但不具有空间梯度的面内磁场。 在诸如信息存储的应用中,减少了诸如偏移导体环路,图案化磁性元件和图案化离子注入区域之类的常规传播结构的需要。 可以通过施加适当的面内磁场来移动具有在其壁磁化中的退绕布洛赫线对的气泡区域,而不需要空间梯度或垂直于磁介质平面的磁场的变化。 这些气泡区域的连续运动通过循环过程发生,其中Bloch线在两个配置之间以不对称的方式在平面场内的时间变化的情况下切换。
    • 2. 发明授权
    • Mechanically actuated magnetocrystalline counter
    • 机械致动磁晶计数器
    • US3961316A
    • 1976-06-01
    • US535868
    • 1974-12-23
    • Jon H. Myer
    • Jon H. Myer
    • G01F15/06G06M1/10G06M1/27G11C19/08H03K23/76G11C11/14
    • H03K23/76G01F15/063G06M1/10G06M1/27G11C19/0816G11C19/0825G11C19/085
    • There is disclosed a miniaturized mechanically actuated magnetocrystalline counter comprising a shift register formed in a known manner on a crystal platelet of uniaxially anisotropic material. The device is suitable for use in counting a series of mechanical events such as the rotation or reciprocation of a mechanical member. Particular examples include the rotation of the unit counter of a utility meter or the reciprocation inherent in the recoil of a discharged weapon. Direct actuation of the counter by the occurrence of the mechanical event is achieved by using a permanent magnet as a transducer. The magnet is mounted to be moved with respect to the platelet responsively to the mechanical event to be counted in such a fashion that it generates a cyclically moving magnetic field to propagate at least one movable magnetic domain through the serial shift register formed in the platelet forming a bit stream which digitally accumulates data representative of the series of mechanical events. Each cycle of the field motion is produced by one of said series of mechanical events and each cycle so produced produces a single bit in said stream either by generating an additional magnetic domain and propagating all prior domains foward or, if only one domain is used, by simply indexing it forward. Any suitable means to readout the accumulated count in the shift register may be used either for direct reading or for remotely controlled electronic reading. The latter technique is particularly suited for remote reading of utility meters where the counter is driven by rotation of the pointer of the units dial of the meter.
    • 公开了一种小型化的机械致动的磁晶计数器,其包括以已知方式在单轴各向异性材料的晶体小片上形成的移位寄存器。 该装置适用于计算一系列机械事件,例如机械构件的旋转或往复运动。 具体实例包括公用事业仪表的单元计数器的旋转或排出的武器反冲固有的往复运动。 通过使用永久磁铁作为换能器来实现机械事件发生的计数器的直接致动。 磁体被安装成响应于要计数的机械事件相对于血小板移动,使得其产生循环移动的磁场,以便将至少一个可移动磁畴传播通过形成在血小板形成中的串联移位寄存器 数字地积累表示一系列机械事件的数据的比特流。 场运动的每个循环由所述一系列机械事件中的一个产生,并且如此产生的每个循环通过产生附加的磁畴并传播所有先前的域来产生所述流中的单个位,或者如果仅使用一个域, 通过简单地向前索引。 用于读出移位寄存器中的累加计数的任何合适的方法可以用于直接读取或用于远程控制的电子阅读。 后一种技术特别适用于远程读取仪表的计量器,其中计数器由仪表的单位表盘的指针旋转驱动。
    • 5. 发明申请
    • SYSTEM AND METHOD FOR MANIPULATING DOMAIN PINNING AND REVERSAL IN FERROMAGNETIC MATERIALS
    • 系统和方法,用于操作领域的引导和反向的纤维材料
    • US20120162815A1
    • 2012-06-28
    • US13383059
    • 2010-07-09
    • Daniel M. SilevitchThomas F. RosenbaumGabriel Aeppli
    • Daniel M. SilevitchThomas F. RosenbaumGabriel Aeppli
    • G11B33/14G11C11/14
    • G11C19/0825G11C11/16
    • A method for manipulating domain pinning and reversal in a ferromagnetic material comprises applying an external magnetic field to a uniaxial ferromagnetic material comprising a plurality of magnetic domains, where each domain has an easy axis oriented along a predetermined direction. The external magnetic field is applied transverse to the predetermined direction and at a predetermined temperature. The strength of the magnetic field is varied at the predetermined temperature, thereby isothermally regulating pinning of the domains. A magnetic storage device for controlling domain dynamics includes a magnetic hard disk comprising a uniaxial ferromagnetic material, a magnetic recording head including a first magnet, and a second magnet. The ferromagnetic material includes a plurality of magnetic domains each having an easy axis oriented along a predetermined direction. The second magnet is positioned adjacent to the magnetic hard disk and is configured to apply a magnetic field transverse to the predetermined direction.
    • 一种用于操纵铁磁材料中的畴钉扎和反转的方法包括将外部磁场施加到包括多个磁畴的单轴铁磁材料,其中每个畴具有沿着预定方向定向的容易轴。 外部磁场横向于预定方向并在预定温度下施加。 磁场的强度在预定温度下变化,从而等温调节畴的钉扎。 用于控制域动态的磁存储装置包括:包括单轴铁磁材料的磁性硬盘,包括第一磁体的磁记录头和第二磁体。 铁磁材料包括多个磁畴,每个磁畴具有沿预定方向定向的容易轴。 第二磁体定位成与磁性硬盘相邻,并且被配置为施加横向于预定方向的磁场。
    • 6. 发明申请
    • MAGNETIC MEMORY, DRIVING METHOD THEREOF, AND MANUFACTURING METHOD THEREOF
    • 磁记忆,其驱动方法及其制造方法
    • US20100135058A1
    • 2010-06-03
    • US12390513
    • 2009-02-23
    • Ching-Hsiang Tsai
    • Ching-Hsiang Tsai
    • G11C19/00H01L21/00H01L29/82
    • G11C19/0808G11C11/14G11C19/0816G11C19/0825
    • A magnetic memory, a driving method thereof, and a manufacturing method thereof are provided. The magnetic memory includes a plurality of lead structures, a plurality of first magnetic metal structures, a second magnetic metal structure, and an insulation layer. Each of the first magnetic metal structures is disposed between adjacent two of the lead structures, and the second magnetic metal structure spans over the lead structures. A structure composed of the first magnetic metal structures and the second magnetic metal structure includes a plurality of magnetic memory cells connected with each other. Each of the magnetic memory cells has a magnetic domain and a domain wall adjacent to the magnetic domain, wherein the magnetic domain is suitable for storing a bit data.
    • 提供了一种磁存储器及其驱动方法及其制造方法。 磁存储器包括多个引线结构,多个第一磁性金属结构,第二磁性金属结构和绝缘层。 每个第一磁性金属结构设置在相邻的两个引线结构之间,并且第二磁性金属结构跨越引线结构。 由第一磁性金属结构和第二磁性金属结构构成的结构包括彼此连接的多个磁性存储单元。 每个磁存储单元具有与磁畴相邻的磁畴和畴壁,其中磁畴适于存储位数据。
    • 8. 发明授权
    • Stripe domain propagation using contiguous bicore disk file structure
    • US4112503A
    • 1978-09-05
    • US785808
    • 1977-04-08
    • Stanley James Lins
    • Stanley James Lins
    • G11C11/14G11C19/08
    • G11C19/0825G11C19/0808G11C19/0875
    • An apparatus for and a method of moving stripe domains in a direction transverse their length is disclosed. The apparatus includes a layer of magnetizable material in which stripe domains are capable of being generated, sustained and moved. Formed upon the magnetizable layer are two parallel contiguous disk files, each of which is formed of a plurality of linearly aligned similar contiguous Bicore disks. Each Bicore disk is comprised of a disk of a relatively soft magnetizable material, e.g., Permalloy, and a superposed disk of a relatively hard magnetizable material, e.g., Cobalt, sandwiching an insulative layer, e.g., silicon dioxide, SiO.sub.2, therebetween. The magnetizations of the superposed soft and hard magnetizable disks of each of the Bicore disks are in a closed, antiparallel aligned direction with the magnetization of each of the soft magnetizable disks of the first contiguous disk file directed across the separating stripe domain propagation area and aligned with but oppositely polarized with respect to the magnetization in the associated soft magnetizable disks in the other, second contiguous disk file. A stripe domain is transferred into the propagation device by coupling the two ends thereof to the two corresponding, oppositely polarized aligned first Bicore disks of the two contiguous disk files. An appropriate propagate drive field, which is directed along the direction of propagation of the stripe domain and which is aligned with the two parallel contiguous disk files, rotates only the magnetizations of the soft magnetizable disks in each of the two contiguous disk files, in a like direction, e.g., the soft magnetizable disks in the first contiguous disk file are rotated in a clockwise direction while the magnetizations of the soft magnetizable disks in the second contiguous disk file are rotated in the counterclockwise direction. The rotating magnetization of the soft magnetizable disks of the two Bicore disks, one at each of the two ends of the stripe domain, carries the stripe domain in the direction of the propagate drive field. When the propagate drive field is suddenly terminated, the magnetizations of the soft magnetizable disks snap back under the influence of the magnetization of the hard magnetizable disk while the stripe domain remains in its new, propagated position downstream between contiguous Bicore disks. Upon successive applications of the propagate drive fields, each end of the stripe domain is transferred from an upstream Bicore disk to the next adjacent downstream Bicore disk while all stripe domains in the propagation device are transferred, in parallel, along the two aligned contiguous disk files through the stripe domain propagation area.