Seagate Technology Incorporated

Yingguo Peng

Ganping Ju

Jan-Ulrich Thiele

Timothy John Klemmer

Yukiko A Kubota

Xiaobin Zhu

Yinfeng Ding

Thomas P Nolan

Kai Chieh Chang

Bin Lu

Kangkang Wang

David S Kuo

Kai-Chieh Chang

Li Gao

Xi Chen

QiHong Wu

Kaizhong Gao

Pin-Wei Huang

Xiaowei Wu

ShuaiGang Xiao

Julius Kurt Hohlfeld

Kim Yang Lee

Chubing Peng

Thomas Young Chang

Amit Vasant Itagi

Florin Zavaliche

Jingsheng Chen

Roy William Chantrell

Alexander Qihong Wu

Michael Allen Seigler

Dieter Klaus Weller

Koichi R Wago

Erol Girt

Werner Scholz

Xiaoding Ma

Jason L Pressesky

Thomas Francis Ambrose

Abebe Hailu

Bogdan Florin Valcu

Alexander Yulievich Dobin

KaiChieh Chang

Yinfeng Deng

Tom Chang

Huihui Li

Yinfong Ding

Hassib Amini

Jason L Presseky

Daniel Staaks

Wei-Heng Hsu

Yassine Quessab

Yue Hu

Thomas Roscamp

Kaifeng Dong

A magnetic stack includes a magnetic recording structure and at least two heat-sink layers where heat-sink layer located furthest from the magnetic recording structure has thermal conductivity equal to or greater than intervening heat-sink layers. One or more interlayers can be included in the magnetic stack. Data storage devices and systems including one or more of the magnetic stacks, and related methods.

Heat-sink structure in magnetic stack, and related articles, systems, and methods

A stack includes a substrate and a magnetic recording layer. Disposed between the substrate and magnetic recording layer is an MgO&#x2014;Ti(ON) layer.

Magnetic stack including MgO&#x2014;Ti(ON) interlayer

Provided herein is an apparatus including a layer stack. A first granular metal layer overlies the layer stack, wherein the first granular metal layer includes first metal grains separated by voids. A first granular non-metal layer overlies the first granular metal layer, wherein the first granular non-metal layer includes first non-metal grains separated by a first segregant. A second granular non-metal layer overlies the first granular non-metal layer, wherein the second granular non-metal layer includes second non-metal grains separated by a second segregant. A second granular metal layer overlies the second granular non-metal layer, wherein the second granular metal layer includes second metal grains separated by a third segregant.

Granularity in overlying magnetic and non-magnetic layers

The embodiments disclose a stack feature of a stack configured to confine optical fields within and to a patterned plasmonic underlayer in the stack configured to guide light from a light source to regulate optical coupling.

Patterned plasmonic underlayer

An apparatus comprises a spindle to rotate a magnetic recording medium and a magnetic field generator to expose a track of the medium to a DC magnetic field. The magnetic field generator is configured to saturate the track during an erase mode and reverse the DC magnetic field impinging the track during a writing mode. A laser arrangement heats the track during the erase mode and, during the writing mode, heats the track while the track is exposed to the reversed DC magnetic field so as to write a magnetic pattern thereon. A reader reads the magnetic pattern and generates a read signal. A processor is coupled to the reader and configured to determine an anisotropy parameter using the read signal. The apparatus can further comprise a Kerr sensor that generates a Kerr signal using the magnetic pattern.

Heat-assisted rotating disk magnetometer for ultra-high anisotropy magnetic measurements

A magnetic stack includes a interlayer structure and a magnetic recording layer disposed over the interlayer in the magnetic stack. The magnetic recording layer includes substantially ordered L, &#x3c;001&#x3e; oriented crystalline magnetic grains laterally separated by a nonmagnetic, segregant material. The interlayer structure comprises a first layer having cubic crystal structure including &#x3c;100&#x3e; oriented crystalline grains and a second layer having crystalline grains laterally separated by a segregant material. The crystalline grains of the second layer are arranged in substantially vertically contiguous alignment with the crystalline grains of the first layer and the segregant material of the magnetic recording layer is arranged in substantially vertically contiguous alignment with the segregant material of the second layer.

Interlayer structure for heat assisted magnetic recording

Determining a Curie temperature (Tc) distribution of a sample comprising magnetic material involves subjecting the sample to an electromagnetic field, heating the sample over a range of temperatures, generating a signal representative of a parameter of the sample that changes as a function of changing sample temperature while the sample is subjected to the electromagnetic field, and determining the Tc distribution of the sample using the generated signal and a multiplicity of predetermined parameters of the sample.

Method and apparatus for determining Curie temperature distribution of a sample of magnetic material

An apparatus is disclosed. The apparatus includes a storage layer, a thermal exchange control layer disposed over the storage layer, and a write layer disposed over the thermal exchange control layer. A Curie temperature of the thermal exchange control layer is lower than a Curie temperature of the storage layer. The Curie temperature of the thermal exchange control layer is lower than a Curie temperature of the write layer.

Heat assisted magnetic recording (HAMR) media with thermal exchange control layer of lower curie temperature

In some embodiments, a thermally assisted data recording medium has a recording layer formed of iron (Fe), platinum (Pt) and a transition metal T selected from a group consisting of Rhodium (Rh), Ruthenium (Ru), Osmium (Os) and Iridium (Ir) to substitute for a portion of the Pt content as FePtTwith Y in the range of from about 20 at % to about 80 at % and X in the range of from about 0 at % to about 20 at %.

Low power thermally assisted data recording media

A magnetic stack includes a substrate and a magnetic recording layer disposed over the substrate. The magnetic recording layer comprises magnetic crystalline grains and a segregant disposed between grain boundaries of the crystalline grains. One or both of the magnetic crystalline grains and the segregant are doped with a rare earth or transition metal dopant in an amount that provides the magnetic recording layer with a magnetic damping value, &#x3b1;, between about 0.1 to about 1.

Damping controlled composite magnetic media for heat assisted magnetic recording

A stack includes a substrate, a magnetic recording layer comprising FePtX disposed over the substrate, and a capping layer disposed on the magnetic recording layer. The capping layer comprises Co; at least one rare earth element; one or more elements selected from a group consisting of Fe and Pt; and an amorphizing agent comprising one to three elements selected from a group consisting of B, Zr, Ta, Cr, Nb, W, V, and Mo.

Capping layer for magnetic recording stack

A stack includes a substrate, a magnetic recording layer having a columnar structure, and an interlayer disposed between the substrate and the magnetic recording layer. The columnar structure includes magnetic grains separated by a crystalline segregant or a combination of crystalline and amorphous segregants.

Magnetic stack including crystallized segregant induced columnar magnetic recording layer

An apparatus includes a substrate and a magnetic layer coupled to the substrate. The magnetic layer includes an alloy that has magnetic hardness that is a function of the degree of chemical ordering of the alloy. The degree of chemical ordering of the alloy in a first portion of the magnetic layer is greater than the degree of chemical ordering of the alloy in a second portion of the magnetic layer, and the first portion of the magnetic layer is closer to the substrate than the second portion of the magnetic layer.

Magnetic layer

Magnetic stack including MgO-Ti(ON) interlayer

Growing community of inventors

San Ramon, CA, United States of America

Yingguo Peng