Seagate Technology Incorporated

Nisha Shukla

Dieter Klaus Weller

Sakhrat Khizroev

Timothy John Klemmer

Dmitri Litvinov

Chao Liu

Joachim Walter Ahner

Neil Deeman

Rene Johannes Marinus Van De Veerdonk

Roy Wallace Gustafson

Erik Bjorn Svedberg

An apparatus includes a substrate, a magnetically soft underlayer on the substrate, and a plurality of generally cubic FePt nanoparticles on the magnetically soft underlayer, wherein the nanoparticles have a magnetization in a direction substantially normal to a surface of the magnetically soft underlayer. The FePt nanoparticles can have magnetically easy axes perpendicular to the surface of the soft underlayer.

Method of producing self-assembled cubic FePt nanoparticles and apparatus using same

A method comprises: heating a solution of platinum acetylacetonate, Fe(CO), oleic acid, and oleylamine in dichlorobenzene to a reflux temperature, refluxing the solution, and using the solution to deposit FePt nanoparticles. A magnetic storage medium that includes cubic FePt particles is also provided.

A magnetic recording medium for high-density recording, having a doped interlayer to preserve the uniformity and ordering of the magnetic nanoparticles in its recording layer. The interlayer is doped with a high electronegativity material. The dopant atoms in the interlayer interact with the ferromagnetic nanoparticles to promote the formation of a homogeneous, ordered monolayer of nanoparticles in the recording layer. In addition, the high electronegative property of the dopant atoms holds the nanoparticles in place during the subsequent annealing process to prevent sintering and disordering damage. In one embodiment, the dopant is a halogen or non-halogen material having a high electronegativity, which is not polymerized to the matrix material in the interlayer. The matrix material may be polymerized. An example of a doped interlayer is a fluorinated carbon film.

Mass storage apparatus using fluorine mediated self-assembly monolayers of nanoparticles recording medium

A magnetic recording disc is provided according to the present invention for magnetic recording. The magnetic recording disc includes a disc substrate having a locking pattern etched therein. Chemically synthesized iron-platinum particles are provided in the locking pattern and completely fill the locking pattern. The chemically synthesized iron-platinum nanoparticles exhibit short-range order characteristics forming self organized magnetic arrays.

Magnetic recording media having self organized magnetic arrays

Magnetic films are annealed by radio frequency (RF) radiation. During the RF annealing process, the layers may be subjected to a magnetic field in order to control their anisotropy axes. The RF annealed layers are useful for applications such as longitudinal and perpendicular magnetic recording layers of magnetic data storage media.

Selective annealing of magnetic recording films

A read head for perpendicular magnetic recording that reduces side reading. The read head includes a read element and a magnetic shield spaced apart from the read element. The magnetic shield at least partially surrounds the read element at an air-bearing surface of the read element. The ratio of an air-bearing surface area of the magnetic shield to an air-bearing surface area of the read element is from about 1:1 to about 40:1.

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Pittsburgh, PA, United States of America

Nisha Shukla