中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

15 records (took 0.019 seconds)

    GRADIENTLESS PROPULSION OF MAGNETIC BUBLE DOMAINS USING MODULATED IN-PLANE FIELDS
    5.
    发明专利
    GRADIENTLESS PROPULSION OF MAGNETIC BUBLE DOMAINS USING MODULATED IN-PLANE FIELDS 未知

    公开(公告)号：CA1111555A

    公开(公告)日：1981-10-27

    申请号：CA291087

    申请日：1977-11-17

    Applicant: IBM

    Inventor： ARGYLE BERNELL E ,  DEKKER PIETER ,  SLONCZEWSKI JOHN C

    IPC: G11C11/14 ,  G11C19/08

    Abstract: GRADIENTLESS PROPULSION OF MAGNETIC BUBBLE DOMAINS USING MODULATED IN-PLANE FIELDS 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.

    CONTROLLABLE STATE CONVERSIONS FOR S=1 BUBBLE DOMAINS
    6.
    发明专利
    CONTROLLABLE STATE CONVERSIONS FOR S=1 BUBBLE DOMAINS 未知

    公开(公告)号：CA1098208A

    公开(公告)日：1981-03-24

    申请号：CA278854

    申请日：1977-05-20

    Applicant: IBM

    Inventor： ARGYLE BERNELL E ,  DEKKER PIETER ,  SLONCZEWSKI JOHN C

    IPC: G11C11/14 ,  G11C19/08 ,  G11B5/84

    Abstract: CONTROLLABLE STATE CONVERSIONS FOR S=1 BUBBLE DOMAINS A technique for controllably providing state conversions between bubble domains having a common winding number S is described. In particular, controlled conversions between bubble domains having winding number S=1 is achieved by the application of spatially invariant, homogeneous magnetic fields. For the conversion of .sigma. bubbles (having two vertical Bloch lines) to X bubbles (having no vertical Bloch lines), an in-plane field is not required and only a time varying perpendicular z-field is used. For conversion of a X+ bubble to a Xbubble, and vice versa, a time varying field pulse is applied, there being no requirement for an in-plane magnetic field. However, for the conversion of X bubbles to .sigma. bubbles, an in-plane field is used simultaneously with a time varying z-field. For all controlled conversions, the applied magnetic fields do not have spatial gradients. The magnitudes of the applied magnetic fields and the rise and fall times of the z field are controlled within certain ranges in order to have controlled conversion of one state to another.

    METHOD AND APPARATUS FOR RECORDING INFORMATION ON A RECORDING SURFACE BY THE USE OF MAGNETIC INK
    9.
    发明专利
    METHOD AND APPARATUS FOR RECORDING INFORMATION ON A RECORDING SURFACE BY THE USE OF MAGNETIC INK 未知

    公开(公告)号：CA1068326A

    公开(公告)日：1979-12-18

    申请号：CA255042

    申请日：1976-06-16

    Applicant: IBM

    Inventor： FAN GEORGE J ,  SLONCZEWSKI JOHN C

    IPC: B41J2/075 ,  B41J2/025 ,  B41J2/105 ,  G06K15/14 ,  G01D15/18

    Abstract: METHOD AND APPARATUS FOR RECORDING INFORMATION ON A RECORDING SURFACE BY THE USE OF MAGNETIC INK A silicon body has an array of nozzles therein and a separate magnet for each nozzle integral with the body. The magnet is disposed adjacent the nozzle with which it cooperates so that it can apply a deflection, prior to break-up of the stream exiting from the nozzle into droplets, to selected portions of the stream. The droplets, which are formed from the selected portions having the magnetic deflection applied thereto from the magnet cooperating with the nozzle, deflect to a gutter and are not applied to a recording surface, which moves orthogonal to the nozzles. If desired, the winding of the magnet can have a second excitation frequency supplied thereto to break up the stream into droplets. The break-up of the stream into droplets also can be accomplished by vibrations produced by a piezoelectric transducer, for example.

    10.
    发明专利
    未知

    公开(公告)号：FR2377684A1

    公开(公告)日：1978-08-11

    申请号：FR7737950

    申请日：1977-12-09

    Applicant: IBM

    Inventor： ARGYLE BERNELL E ,  DEKKER PIETER ,  SLONCZEWSKI JOHN C

    IPC: G11C11/14 ,  G11C19/08

    Abstract: 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.

Patent Agency Ranking