Showa Denko K.k.

Katsuaki To

Takehiko Okabe

Kota Hasegawa

Eishin Yamakawa

Saeko Hayase

A magnetic recording medium includes a nonmagnetic substrate, a soft magnetic underlayer, an orientation control layer, a perpendicular magnetic layer, and a protection layer that are arranged in this order. The perpendicular magnetic layer includes a first magnetic layer and a second magnetic layer that are arranged in this order on the orientation control layer. The first magnetic layer has a granular structure including an oxide at grain boundary parts of magnetic grains, and the second magnetic layer is closest to the protection layer among layers within the perpendicular magnetic layer, and includes magnetic grains made of a CoCrPt alloy, and a nitride of carbon or a hydride of carbon.

Magnetic recording medium having magnetic layer with nitride of carbon or hydride of carbon, and magnetic storage apparatus

Magnetic recording medium having magnetic layer with hydride of carbon, and magnetic storage apparatus

In a magnetic recording medium of the present invention, an outermost surface of a protective layeron a lubricant layerside contains carbon and nitrogen in a range of 50 atomic % to 90 atomic %, and the lubricant layeris formed by being in contact with the outermost surface, contains compounds A to C represented in the below general formulas (1) to (3) described below, and has a film thickness of 0.5 nm to 2 nm.R1-CHOCHCH(OH)CHOCH&#x2014;R2-CHOCHCH(OH)CHOH &#x2003;&#x2003;(1),CH(OH)CH(OH)CHOCHCFCF(OCFCFCF)OCFCFCHOCHCH(OH)CHOH &#x2003;&#x2003;(2),HOCHCFCFO(CFCFCFO)sCFCFCHOCHCH(OH)CHOH &#x2003;&#x2003;()

Magnetic recording medium and magnetic recording and reproducing apparatus

A method of fabricating a magnetic recording medium by sequentially forming a magnetic recording layer, a protection layer, and a lubricant layer on a stacked body, includes forming the lubricant by depositing a first lubricant on the stacked body after forming the protection layer, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere, and depositing a second lubricant on the stacked body after depositing the first lubricant, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere. The first lubricant has a lower molecular mass and a higher chemical polarity than those of the second lubricant.

Magnetic recording medium fabrication method

A method of fabricating a magnetic recording medium by sequentially forming a magnetic recording layer, a protection layer, and a lubricant layer on a stacked body, includes forming the lubricant by depositing a first lubricant on the stacked body after forming the protection layer, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere, and depositing a second lubricant on the stacked body after depositing the first lubricant, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere.

Magnetic recording medium fabrication method and apparatus

A method of fabricating a magnetic recording medium by sequentially forming a magnetic recording layer, a protection layer, and a lubricant layer on a stacked body, includes forming the lubricant by depositing a first lubricant on the stacked body after forming the protection layer, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere, and depositing a second lubricant that is dissolved in an organic solvent onto the stacked body after depositing the first lubricant.

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Chiba, Japan

Katsuaki To