Test Method for Thermally Assisted Magnetic Recording Applying Surface Plasmon Antennas Stacked on Magnetic Layer

In heat assisted magnetic recording (HAMR) system, heating of the hard disk magnetic layer is carried out by applying laser rays during the movement of the read/write head over the carbon overcoat for the purpose of reading and writing on its magnetic layer.

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Integrated head design using a nanobeak antenna for thermally assisted magnetic recording

Optics Express ◽

10.1364/oe.20.018946 ◽

2012 ◽

Vol 20 (17) ◽

pp. 18946 ◽

Cited By ~ 34

Author(s):

Takuya Matsumoto ◽

Fumiko Akagi ◽

Masafumi Mochizuki ◽

Harukazu Miyamoto ◽

Barry Stipe

Keyword(s):

Magnetic Recording ◽

Thermally Assisted Magnetic Recording

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The Dependence of the Corrosion Behavior of Rigid Disk Magnetic Recording Media on the Deposition Conditions of the Underlayer, Magnetic Layer, and Carbon Overcoat

Journal of The Electrochemical Society ◽

10.1149/1.2069411 ◽

1992 ◽

Vol 139 (5) ◽

pp. 1352-1358 ◽

Cited By ~ 9

Author(s):

Paul J. Sides

Keyword(s):

Corrosion Behavior ◽

Magnetic Recording ◽

Magnetic Layer ◽

Recording Media ◽

Magnetic Recording Media ◽

Carbon Overcoat ◽

Rigid Disk ◽

Deposition Conditions

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Tolerance Analysis of the Pitch Static Attitude of a Thermally Assisted Magnetic Recording System With an Optical Fiber and Prism

IEEE Transactions on Magnetics ◽

10.1109/tmag.2010.2100036 ◽

2011 ◽

Vol 47 (3) ◽

pp. 585-589 ◽

Cited By ~ 1

Author(s):

Ki-Hoon Kim ◽

No-Cheol Park ◽

Young-Pil Park ◽

Kyoung-Su Park

Keyword(s):

Optical Fiber ◽

Magnetic Recording ◽

Tolerance Analysis ◽

Recording System ◽

Thermally Assisted Magnetic Recording

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Novel droplet near-field transducer for heat-assisted magnetic recording

Nanophotonics ◽

10.1515/nanoph-2015-0031 ◽

2015 ◽

Vol 4 (4) ◽

pp. 503-510 ◽

Cited By ~ 16

Author(s):

Jacek Gosciniak ◽

Marcus Mooney ◽

Mark Gubbins ◽

Brian Corbett

Keyword(s):

Surface Plasmon ◽

Magnetic Recording ◽

Near Field ◽

Metal Structure ◽

Spot Size ◽

Impedance Match ◽

Localized Surface Plasmon ◽

Heat Assisted Magnetic Recording ◽

Localized Surface Plasmon Resonances ◽

High Degree

AbstractTwo main ingredients of plasmonics are surface plasmon polaritons (SPP) and localized surface plasmon resonances (LSPR) as they provide a high degree of concentration of electromagnetic fields in the vicinity of metal surfaces, which is well beyond that allowed by the diffraction limit of optics. Those properties have been used in the new technique of heat assisted magnetic recording (HAMR) to overcome an existing limit of conventional magnetic recording by utilizing a near-field transducer (NFT). The NFT designs are based on excitation of surface plasmons on a metal structure, which re-radiate with a subdiffraction limited light spot confined in the near field. In this paper, we propose a novel “droplet”-shaped NFT, which takes full advantage of a recenltly proposed Mach–Zehnder Interferometer (MZI), a coupling arrangement that allows optimal coupling of light to the transducer. The droplet design ensures better impedance match with the recording media and, consequently, better coupling of power. The droplet design results in very high enhancement of the electric field and allows the confinement of light in a spot size much smaller than the present stateof- the-art lollipop transducer.

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Co3Pt Nanocomposite Films for Perpendicular Magnetic Recording Media

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.123-125.27 ◽

2010 ◽

Vol 123-125 ◽

pp. 27-30 ◽

Cited By ~ 1

Author(s):

Chih Long Shen ◽

Po Cheng Kuo ◽

S.C. Chen ◽

C.D. Chen ◽

S.L. Hsu ◽

...

Keyword(s):

Thin Films ◽

Magnetic Properties ◽

Process Parameters ◽

Magnetic Recording ◽

Magnetic Layer ◽

Nanocomposite Films ◽

Recording Media ◽

Magnetic Recording Media ◽

Perpendicular Magnetic Recording ◽

Significant Potential

The Co3Pt magnetic layer with thickness of 7~28 nm was deposited onto the Pt underlayer. The as-deposited Co3Pt/Pt double-layered films with or without a 5 nm Pt capped layer were annealed at temperatures between 275 and 375 °C in vacuum of 1 mTorr. The influences of process parameters on perpendicular magnetic properties of Co3Pt thin films were investigated. The Co3Pt film with perpendicular coercivity (Hc⊥) value of 3620 Oe and the perpendicular squareness (S⊥) of 0.7 could be achieved from the Co3Pt(18 nm)/Pt(100 nm) double-layered films by annealing at 300°C. Further added Tb30Co70 film on the Co3Pt/Pt double-layered film could greatly enhance the perpendicular magnetic properties of the film. The Hc⊥ and S⊥ of the Tb30Co70/Co3Pt/Pt film were as high as 6560 Oe and 0.88, respectively, which has significant potential to be applied in perpendicular magnetic recording media.

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