Method of writing data onto and reading data from a magnetic carrier and a head unit for carrying this out

摘要

The invention relates to data storage. The proposed method of writing data onto and reading them from a magnetic carrier (6) involves allowing a directional beam of electromagnetic radiation to act on the section (5) of the magnetic circuit (2) of the head which faces the carrier (6) to create a local reversible disturbance in the magnetic conductivity in the form of a virtual gap. The proposed head for carrying out this method comprises an electromagnetic radiation source (7) and a closed magnetic circuit (2) made of a magnetic substance with pronounced thermomagnetic properties. One section (3) of the magnetic circuit (2) has an electric winding (4) around it, while the other (5) faces the carrier (6) and is connected by means of a waveguide (7) to the electromagnetic radiation source (7).