Magnetic transducer for reading and/or recording of data contained on a magnetic carrier

A magnetic transducer adapted to perform read and/or write functions on a magnetic data carrier which travels before the same, the data being contained within a plurality of tracks on the carrier comprising:

• a magnetic circuit formed by two pole pieces separated by a gap parallel to the carrier, the gap having a larger dimension perpendicular to the direction of travel of the data of a track as it passes in front of said gap, the two pole pieces comprise thin superimposed magnetic layers coupled magnetically at one extremity, the other extremity adapted to be positioned close to the carrier and substantially perpendicular to the carrier to form the gap, said layers having a constriction of a width LP.sub.g at the level of the gap, which defines the lateral walls of the pole pieces in the form of concave lateral surfaces, the said channelling means being thin magnetic layers deposited on the said lateral walls,
• a winding coupled magnetically to the magnetic circuit, and means situated at either side of the gap as seen in the direction of its larger dimension and operatively associated with the pole pieces for channelling magnetic flux emitted by the immediate surroundings of the track of the record carrier to be read by the transducer in such manner that said flux does not pass through said winding.