Magnetic memory array, method for recording in a magnetic memory array and method for reading out from a magnetic memory array

A method for recording in a magnetic memory array, comprising the steps of:

• preparing a plurality of magnetic memories with respective ring-shaped magnetic layers,
• partially cutting out peripheries of said magnetic layers in circular arc shape to form respective notches therein,
• arranging said magnetic memories so that surfaces of said notches are parallel to one another to form a magnetic memory array, and
• applying an external magnetic field to said magnetic memory array to perform a recording operation for said magnetic memory array.

A method for reading out from a magnetic memory array, comprising the steps of:

• preparing a plurality of magnetic memories with respective ring-shaped magnetic layers,
• partially cutting out peripheries of said magnetic layers in circular arc shape to form respective notches therein,
• forming ring-shaped additional magnetic layers on said magnetic layers via non-magnetic layers, respectively,
• arranging said magnetic memories so that surfaces of said notches are parallel to one another to form a magnetic memory array, and
• applying an external magnetic field to said magnetic memory array to perform a recording operation for said magnetic memory array and create a right-handed (clockwise) or a left-handed (anticlockwise) magnetization in at least one of said magnetic memories,
• allotting information “0” or “1” to said right-handed (clockwise) or said left-handed (anticlockwise) magnetization, and
• reading out said information “0” or “1” on the change in electric resistance of said at least one of said magnetic memories due to the relative direction in magnetization between said magnetic layer and said additional magnetic layer thereof.