Field access of bubble domain lattice

An apparatus for translating a two-dimensional lattice of interacting bubble domains in response to the reorientation of a magnetic field, comprising:

• first means for moving selected bubble domains in said lattice by magnetic poles during a first orientation of said magnetic field,
• second means for moving said selected bubble domains in said lattice by repulsive forces due to bubble-bubble interactions during a second orientation of said magnetic field,
• said first and second means substantially retaining the order and shape of said two-dimensional lattice during said bubble domain movement, wherein said first and second means are comprised of chevron-shaped magnetic elements periodically arranged in an array.

An apparatus for moving magnetic bubble domains located in a magnetic medium and having a two-dimensional lattice arrangement wherein adjacent bubble domains interact with one another in said lattice, in response to the reorientation of a magnetic field, comprising:

• means for moving a two-dimensional group of bubble domains in said lattice in a desired direction while substantially retaining their order and arrangement, said means including
• magnetic means for driving by magnetic poles at least one selected bubble domain of said group of bubble domains during a given orientation of said magnetic field while non-selected bubble domains in said group are driven by bubble-bubble repulsion, and
• further means for directly driving said non-selected bubble domains in said two-dimensional group by magnetic poles during another orientation of said magnetic field.

An apparatus for translating a two-dimensional lattice of interacting magnetic bubble domains in response to the reorientations of a magnetic field, comprisng:

• a magnetic medium in which said bubble domains can be moved, and
• an array of magnetic elements where said elements are located in positions in said array to provide a substantially even spatial distribution of magnetic poles attractive to said bubble domains when said magnetic field is present, said magnetic elements having geometries and thicknesses to provide an array in which the driving forces on said bubble domains in said two-dimensional lattice are substantially the same during different orientations of said magnetic field to thereby translate said lattice while substantially maintaining its integrity.

A structure for moving magnetic bubble domains arranged in a two-dimensional lattice of interacting bubble domains in response to the reorientation of a magnetic field, said two-dimensional lattice being comprised of rows and columns of bubble domains, comprising:

• a magnetic medium in which said bubble domains can be moved,
• an array of periodically arranged chevron magnetic elements along which magnetic poles are produced in response to the different orientations of said magnetic field, said array comprising chevron magnetic elements for moving a column of bubble domains in said two-dimensional lattice while maintaining the integrity of said lattice.