METHOD AND APPARATUS FOR GENERATING MAGNETIC FIELD LOCALISED IN NANOSIZED REGION OF SPACE Russian patent published in 2012 - IPC H01F1/12 

FIELD: physics.

SUBSTANCE: localised magnetic field is generated in space over a gap between open ends, lying in the same plane, of two parallel ferromagnetic layers, separated by a layer which provides antiferromagnetic coupling between the ferromagnetic layers. Localisation dimensions are defined by the thickness of the separating layer between the ferromagnetic layers, which are made from magnetically soft materials with layer thickness values h₁ and h₂, which satisfy the relationship M₁h₁=M₂h₂, where M₁ and M₂ are the saturation magnetisation values of the corresponding ferromagnetic layers, and the direction of the field over the gap is defined by the difference in total magnetic moments of the ferromagnetic layers.

EFFECT: high spatial resolution and control of the value and sign of a local field using an external magnetic field.

4 cl, 3 dwg