| 摘要 |
PURPOSE:To efficiently apply a strong magnetic field to a recording position so that sure overlap writing under a high-frequency magnetic field is permitted and a data transfer speed is increased by providing a thin film material which has high magnetic permeability and high saturation magnetic flux density and extends in the direction perpendicular to the plane of a recording medium in proximity to the desired recording position of the medium. CONSTITUTION:The recording layer 14 consisting of an amorphous metal alloy film of a rare metal and transition metal is provided on a substrate 12 consisting of glass, etc., to form a magneto-optical disk 10. An optical head 16 consisting of a semiconductor laser 20 and a focusing lens 18 movable in the radial direction of the disk is disposed thereon. A small-sized magnetic head 2 consisting of an excitation coil 26 wound on a soft magnetic core 24 is disposed to the lower side of the disk 10. High-frequency current of, for example, 1MHz, etc., is passed to terminals 28, 30 and the generated magnetic field is directed toward the disk 10. Glass plates 34, 36 vertically sandwiching a thin soft magnetic amorphous Co.Ta.Zr film 32 are provided between the disk 10 and head 16 in this constitution so that the magnetic flux from the head 22 is directed to the recording position 14a. |
