MAGNETIC ELEMENT AND METHOD TO CONTROL PARAMETERS OF MAGNETIC VORTEX IN FERROMAGNETIC DISCS Russian patent published in 2014 - IPC G01R33/02 G11C11/02 

FIELD: measurement equipment.

SUBSTANCE: group of inventions relates to the field of magnetic micro- and nanoelements, represents a magnetic element for monitoring of parameters of a magnetic structure of "vortex" type, which may be used as a basis to create a magnetoresistive random access memory, and also the method of such monitoring applicable for diagnostics of nanomaterials. The concept of the invention is as follows: a magnetic element of two ferromagnetic discs of various diameter is formed on a substrate from silicon, and the discs are asymmetrically arranged on each other and separated with a layer from non-magnetic materials, having a disc shape. Dimensions of the magnetic element are such that in a large disc with no induced magnetic field available a vortex state is generated, and in a small disc - a single-domain one. Depending on the angle of magnetic field application, a vortex state is generated in the large disc with certain chirality, and in the small disc - a single-domain state with controlled direction of magnetisation.

EFFECT: design of a magnetic element makes it possible to create an asymmetric configuration of a magnetic structure, which is a necessary condition for monitoring vortex parameters as it is generated in a large disc, and provides an opportunity to control chirality of a vortex generated in a large disc, and direction of magnetisation in a small disc It is achieved during application of magnetic field at the angles of 0, 90, 180 or 270 degrees relative to the axis that connects centres of discs.

10 cl, 4 dwg, 1 ex