According to one aspect of the present invention, an organic fluorine compound is represented by a general formula
(R-π-E-CH.sub.2-A-CH.sub.2-E′).sub.n-π′-G  (1B) (where n is an integer of 2 to 5, A is a divalent perfluoropolyether group, π is an arylene group or a single bond, R is an alkenyl group or an alkynyl group, and E and E′ are each independently an ether bond or an ester bond or a group that is represented by a chemical formula
—O—CH.sub.2CH(OH)CH.sub.2O—
π′ is a group in which n+1 hydrogen atoms are separated from benzene, G is an organic group containing a fullerene skeleton, the n number of groups each of which is represented by a general formula
R-π-E-CH.sub.2-A-CH.sub.2-E′-
may be the same or different, and at least one π among the n number of π is an arylene group).

A lubricant for a magnetic recording medium capable of forming a lubricant layer having excellent adhesion to a protective layer is provided. A lubricant for a magnetic recording medium contains a fluorine-containing ether compound in which a group having an ethylenic carbon-carbon double bond is disposed at one or both terminals of a perfluoroalkyl polyether chain. It is preferable that the group having the ethylenic carbon-carbon double bond is disposed at one terminal of the perfluoroalkyl polyether chain, and a hydroxyl group is disposed at other terminal. It is preferable that the lubricant for a magnetic recording medium contains a compound in which one or more functional groups selected from a hydroxyl group, an amino group, an amido group and a carboxyl group is disposed at one or both terminals of a perfluoroalkyl polyether chain.

Various apparatuses, systems, methods, and media are disclosed to provide a magnetic recording medium that capping layer doped with an effective amount of metal to control grain-to-grain exchange coupling in a capping layer. A magnetic recording medium includes a substrate, a magnetic recording layer (MRL) on the substrate, and a capping layer on the MRL. The capping layer include Co and is doped with a metal (e.g., Ru or Ta) in a range from 1 atomic percent to 5 atomic percent, inclusive.

A vacuum process method for a magnetic recording medium having a surface protective layer for protecting a magnetic recording layer formed on a substrate includes a ta-C film forming step of forming a ta-C film on the magnetic recording layer, a transportation step of transporting a substrate on which the ta-C film is formed, a radical generation step of generating radicals by exciting a process gas, and a radical process step of irradiating a surface of the ta-C film with the radicals.

A method for forming a magnetic recording medium according to one embodiment includes forming a magnetic layer above an underlayer. The magnetic layer includes a first magnetic material and particulates. A protective layer is formed above the magnetic layer, the protective layer including a second material. A method for forming a magnetic recording medium according to another embodiment includes forming a first nonmagnetic layer above a base film. The first nonmagnetic layer has first nonmagnetic particles. A second nonmagnetic layer is formed above the first nonmagnetic layer, the second nonmagnetic layer having second nonmagnetic particles. A magnetic layer is formed above the second nonmagnetic layer, the magnetic layer including a magnetic material.

A magnetic recording medium according to one embodiment includes an underlayer and a magnetic layer above the underlayer. The magnetic layer includes a first magnetic material and particulates. A protective layer is positioned above the magnetic layer, the protective layer including a second material. A magnetic recording medium according to another embodiment includes a base film and a first nonmagnetic layer above the base film. The first nonmagnetic layer has first nonmagnetic particles. A second nonmagnetic layer is positioned above the first nonmagnetic layer, the second nonmagnetic layer having second nonmagnetic particles. A magnetic layer is positioned above the second nonmagnetic layer, the magnetic layer including a magnetic material.

A magnetic media disk is fabricated by depositing magnetic layers over the disk, then depositing protective later over the magnetic layer, and then performing ion implant process to implant ions into the protective coating. A system for performing the ion implant of the magnetic media disk includes two ion implant chambers. During operation one chamber performs ion implant and one chamber performs chamber cleaning by maintaining inside a plasma of cleaning gas without a disk present inside the chamber.

In one embodiment, a method for forming a substantially monodisperse lubricant includes: providing a plurality of perfluoropolyether (PFPE) precursors, each PFPE precursor including two end segments and a PFPE backbone disposed therebetween; protecting one of the end segments of each PFPE precursor with one or more protecting agents to form a plurality of mono-protected PFPE precursors, each mono-protected PFPE precursor including a protected end segment and an unprotected end segment; and coupling the unprotected end segment of each of the mono-protected PFPE precursors to the unprotected end segment of another of the mono-protected PFPE precursors via a coupling agent to form multidentate PFPE structures. In another embodiment, a substantially monodisperse lubricant includes a plurality of multidentate perfluoropolyether (PFPE) structures, each multidentate PFPE structure including at least two end segments and a middle segment therebetween, wherein the multidentate PFPE structures have a molecular weight that is substantially the same.

The present invention relates to a device for magnetic recording that includes a storage medium having a media surface. The media surface has a plurality of lands and recesses between the lands. A polymer layer fills the recesses so that the media surface is substantially planar.

A manufacturing method for a magnetic recording medium which includes a magnetic layer, a lower protective layer, an upper protective layer and a lubricating layer on a substrate, and in which the total film thickness of the lower protective layer and the upper protective layer is 2.5 nm or less, includes: 1) depositing the lower protective layer; 2) performing oxygen plasma treatment on the lower protective layer; 3) depositing the upper protective layer; and 4) performing nitrogen plasma treatment on the upper protective layer. It is preferable that the lower protective layer and the upper protective layer are formed of a carbon-based material, and it is further more preferable that the lower protective layer and the upper protective layer are formed of diamond-like carbon. Moreover, it is preferable that the contact angle of the lower protective layer with respect to water in the atmosphere is 25° or less.