Patent ID: 6689456
Filing Date: 2004-02-10
Classification: G11B,Y10T

Abstract:
A magnetic recording medium comprising:a substrate; an information-recording magnetic layer formed on said substrate; and an inorganic compound layer, containing crystal particles and amorphous grain boundary phases surrounding said particles, formed between said substrate and said magnetic layer; wherein said inorganic compound layer comprises a first component material and a second component material, wherein said first component material comprises a material having a sodium chlorides crystal structure or a material that is a spinal crystal oxide, and said second component material contains at least one selected from the group consisting of oxides, nitrides, and borides of elements belonging to groups I to V of the periodic table; and wherein said magnetic layer contains crystal magnetic particles whose mean grain size is 4 nm to 15 nm and the standard deviation (&sgr;) of the grain size is 25% or less of said mean grain size.