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US 5,843,569 AGranted
Magnetic recording medium and device
AssigneeFujitsu Limited
InventorsIsatake Kaitsu, Iwao Okamoto
Life of this patent
Estimating the term…
Abstract
A magnetic recording medium comprising: a substrate; and a magnetic recording layer provided on the substrate, the magnetic recording layer being comprised of a thin film of a nonmagnetic material with crystal grains of Co.sub.100-x Pt.sub.x, wherein 10.ltoreq..times.<20, having an f.c.c. structure and an average grain diameter of not more than 50 nm being substantially uniformly dispersed therein, the product of the residual magnetization and the thickness of the magnetic recording layer being not more than 150 Gauss..mu.m.
Claims8
A magnetic recording medium comprising:
- a substrate;
- and a magnetic recording layer provided on the substrate, the magnetic recording layer having crystal particles of Co.sub.100-x Pt.sub.x, wherein 10.ltoreq..times.<20, said crystal particle being substantially uniformly dispersed in a nonmagnetic material, said crystal particles having an f.c.c. structure and an average grain diameter of not more than 50 nm, wherein the product of the residual magnetization and the thickness of the magnetic recording layer is not more than 150 Gauss..mu.m.
A magnetic recording device comprising:
- a magnetic recording medium including a substrate and a magnetic recording layer is provided on the substrate, the magnetic recording layer having crystal particles of Co.sub.100-x Pt.sub.x, wherein 10.ltoreq..times.<20, being substantially uniformly dispersed in a nonmagnetic material, said crystal particles having an f.c.c. structure and an average grain diameter of not more than 50 nm, wherein the product of the residual magnetization and the thickness of the magnetic recording layer being 150 Gauss..mu.m;
- and
- a magnetoresistive reproducing head.
Dependencies are inferred from the claim text.