公开(公告)号：FR2355356A1

公开(公告)日：1978-01-13

申请号：FR7714008

申请日：1977-05-03

Applicant: IBM

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

IPC: G11C11/14 ,  G11C19/08

Abstract: 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 chi 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 chi + bubble to a chi - bubble, 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 chi 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.

公开(公告)号：CA1096040A

公开(公告)日：1981-02-17

申请号：CA271786

申请日：1977-02-11

Applicant: IBM

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

IPC: G11C11/14 ,  G11C19/08

Abstract: Magnetic bubble domains are propagated in a magnetic medium in a desired direction using magnetic fields which have no spatial gradients. This is in contrast with conventional propagation techniques where magnetic overlays have to be used with applied magnetic fields in order to move domains. Depending upon the wall magnetization configurations in the domains, those domains are propagated by using, for example, a combination of a steady magnetic field and a magnetic field which varies with time, such as a pulse field or a sinusoidal field. This type of propagation is termed automotion. Bubbles which can automate are generated and detected in the magnetic medium using the principals of automotion. Embodiments a:- shown for representation of information using different types of bubbles, and in particular it is shown how to discriminate among bubble domains having wall configurations having a common winding number s. In a particular embodiment, a modulated bias field is superimposed on a steady magnetic field in the plane of the magnetic medium. Depending upon the direction of the in-plane magnetic field and upon the wall magnetization configuration of the bubbles, the bubbles can be made to move in different directions regardless of the directions of the modulated bias field.

公开(公告)号：CA1044368A

公开(公告)日：1978-12-12

申请号：CA208382

申请日：1974-08-30

Applicant: IBM

Inventor： CALHOUN BERTRAM A ,  SLONCZEWSKI JOHN C ,  VOEGELI OTTO

IPC: G11C11/14 ,  G11C19/08

Abstract: SYSTEMS USING LATTICE ARRAYS OF INTERACTIVE ELEMENTS Apparatus is provided using as an integral portion thereof a confined array (such as a lattice) of interactive elements, the interactions among which are largely determinative of the positions of the interactive elements since there is a minimum of position determining structure for the elements within the area of confinement. Magnetic elements are suitable interactive elements, and in particular embodiments are shown using magnetic bubble domains. Means are provided to form lattice arrays of interactive elements, to confine the lattice arrays, and to access elements outside and within the lattice array. In addition, means is provided to code the interactive elements for storage of information, and reading means is provided to detect the information state of the interactive elements when these elements are coded. Various types of lattices and interactive elements can be used.

公开(公告)号：CA1033458A

公开(公告)日：1978-06-20

申请号：CA193611

申请日：1974-02-27

Applicant: IBM

Inventor： SLONCZEWSKI JOHN C

IPC: G11C11/14 ,  G11C19/08 ,  H03K19/168

Abstract: A magnetic domain system utilizing domains having different wall magnetization properties. In particular, domains are herein characterized in accordance with their direction of motion in a gradient magnetic field which is substantially parallel to an easy axis of magnetization of the medium in which the domains exist. This deflection is in turn dependent upon the number of rotations of the magnetic moments in the domain wall, i.e., the total number and sign of the vertical Bloch lines present in the periphery of the domain. Magnetic systems are shown utilizing generators for producing domains of desired state, storage means for storing these domains, and sensing means for detecting the different states of the domains. Since multistate magnetic domains are generated, various levels of logic circuitry can be designed. Examples include ternary logic systems and functional memories.

公开(公告)号：FR2341915A1

公开(公告)日：1977-09-16

申请号：FR7700645

申请日：1977-01-05

Applicant: IBM

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

IPC: G11C11/14 ,  G11C19/08