PURPOSE: To make it possible to perform recording and reproduction by use of a head having a simple structure, by arraying magnetic flux focusing substances in the lower side of the magnetic recording layer, in the recording medium for vertical magnetic record which is made by forming a magnetic recording layer on the surface of a non-magnetic basic substance.
CONSTITUTION: Numbers of dot-like magnetic flux focusing substances 3 consisting of material of high magnetic permeability such as permalloy, etc. are arrayed on the basic substance 2 consisting of non-magnetic material (plastic, glass, etc.) (it is desirable to make them form a line at a fixed pitch along the track.), on which a magnetic recording layer 4 having thickness of 0.1W3μ or so is formed by vertically placing an easy magnetizing axis, and it is made a recording medium 1. The afore-said medium 1 is able to easily record and reproduce by use of a vertical magnetic recording and reproducing head 7 of simple structure which has been made by winding a coil 6 around the iron core 5. In this regard, as far as the aforesaid magnetic flux focusing substances 3 are concerned, it is allowed to array them on the reverse side of the basic substance 2 and also to use them as a line shape, as well.
JPS5434205A | 1979-03-13 |