Wd Media, LLC

University of Minnesota

Xiaofeng Yao

Yi Heng Chen

Jian-Ping Wang

Jonathan D Harms

Paul Christopher Dorsey

David J Lilja

Ge Xu

Andrew P Lyle

Shruti R Patil

Wei Kah Tan

Yang Yun

A magnetic-recording medium includes a hydrogen and nitrogen implanted carbon overcoat (HNICOC) on a magnetic-recording layer. The HNICOC includes nitrogen implanted in a top-surface layer of the HNICOC such that a percentage ratio of a concentration of the implanted nitrogen to a concentration of carbon is between about 30 percent (%) to about 10% within a depth from about 2 &#x212b;ngstrom (&#x212b;) to about 5 &#x212b; from the top surface of the HNICOC. An amount of hydrogen implanted in the top-surface layer is between about 1% to about 12% within a distance less than about 5 &#x212b; from the top surface. A data storage device that incorporates the magnetic-recording medium within a magnetic-recording disk, and a method for making the magnetic-recording medium are also described.

Magnetic-recording medium including a carbon overcoat implanted with nitrogen and hydrogen

Methods for reducing the surface roughness of magnetic media to be used in storage drives are described. One such method includes forming a recording media on a substrate, the recording media including at least one recording layer configured to store information magnetically, depositing a first layer of carbon on the recording media, the first carbon layer having a first average preselected thickness, etching the first carbon layer to have a second average preselected thickness less than the first average preselected thickness, depositing a second layer of carbon on the etched first carbon layer, the second carbon layer having a third average preselected thickness that is less than the first average preselected thickness, and implanting nitrogen in the second carbon layer.

Methods for reducing surface roughness of magnetic media for storage drives

Systems and methods that enable direct communications between magnetic tunnel junctions are provided. In one embodiment, a device includes multiple input magnetic tunnel junctions and an output magnetic tunnel junction. The multiple input magnetic tunnel junctions are connected in parallel, and the output magnetic tunnel junction is connected in series to the input magnetic tunnel junctions. In another embodiment, a device includes a first magnetic tunnel junction, a second magnetic tunnel junction, and a nano-magnetic channel. Each of the first and the second magnetic tunnel junctions has a free layer, a nonmagnetic layer, and a fixed layer. The nano-magnetic channel connects the free layer of the first magnetic tunnel junction to the free layer of the second magnetic tunnel junction.

Systems and methods for direct communication between magnetic tunnel junctions

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San Jose, CA, United States of America

Xiaofeng Yao