HAMR Recording Limitations and Extendibility

Wang, Xiaobin; Gao, Kai-Zhong; Zhou, Hua; Itagi, A. V.; Seigler, Michael A.; Gage, Edward C.

doi:10.1109/tmag.2012.2221689

Cited by 100 publications

(41 citation statements)

References 10 publications

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“…While current HDD based on CoPtCr-oxide granular film is expected to limit the maximum AD of 1.0-1.5 Tb/in 2 , heat-assisted magnetic recording (HAMR) media based on L1 0 FePt granular film is considered to extend the maximum AD over 4 Tb/in 2 owing to the high magnetocrystalline anisotropy of L1 0 ordered phase for FePt (K u ~ 7 × 10 7 erg/cm 3 ) [1][2][3]. In order to realize the L1 0 ordered FePt granular film as a high recording density medium, it is necessary to enhance the signal-tonoise ratio (SNR).…”

Section: Introductionmentioning

confidence: 99%

Amorphous Cr-Ti Texture-inducing Layer Underlying (002) Textured bcc-Cr alloy Seed Layer for FePt-C Based Heat-assisted Magnetic Recording Media

Jeon¹,

Hinata

Saito

2016

Journal of Magnetics

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Cr 100-x Ti x amorphous texture-inducing layers (TIL) were investigated to realize highly (002) oriented L1 0 FePt-C granular films through hetero-epitaxial growth on the (002) textured bcc-Cr 80 Mn 20 seed layer (bcc-SL). Asdeposited TILs showed the amorphous phase in Ti content of 30 ≤ x (at%) ≤ 75. Particularly, films with 40 ≤ x ≤ 60 kept the amorphous phase against the heat treatment over 600 o C. It was found that preference of the crystallographic texture for bcc-SLs is directly affected by the structural phase of TILs. (002) crystallographic texture was realized in bcc-SLs deposited on the amorphous TILs (40 ≤ x ≤ 70), whereas (110) texture was formed in bcc-SLs overlying on crystalline TILs (x < 30 and x > 70). Correlation between the angular distribution of (002) crystal orientation of bcc-SL evaluated by full width at half maximum of (002) It is suggested that the reduction of (002) FWHM affects to the overlying MgO film as well as FePt-C granular film by means of the hetero-epitaxial growth.

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Section: Introductionmentioning

confidence: 99%

Amorphous Cr-Ti Texture-inducing Layer Underlying (002) Textured bcc-Cr alloy Seed Layer for FePt-C Based Heat-assisted Magnetic Recording Media

Jeon¹,

Hinata

Saito

2016

Journal of Magnetics

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“…This is about 55% higher than today's 620 Gb/in 2 in 3.5-inch hard drives. Extension to beyond 1 Tb/in 2 can be achieved by increasing the magnetic anisotropy and reducing the grain size [8]. More recently, Seagate Technology introduced a prototype of a fully integrated and functioning HAMR drive [9,10] and proposed that the next generation HAMR technology will be incorporated into 2.5-inch enterprise HDDs.…”

Section: Introductionmentioning

confidence: 99%

Plasmonic near-field transducer for heat-assisted magnetic recording

Zhou

Hammack³

et al. 2014

Nanophotonics

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139

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Plasmonic devices, made of apertures or antennas, have played significant roles in advancing the fields of optics and opto-electronics by offering subwavelength manipulation of light in the visible and near infrared frequencies. The development of heat-assisted magnetic recording (HAMR) opens up a new application of plasmonic nanostructures, where they act as near field transducers (NFTs) to locally and temporally heat a sub-diffractionlimited region in the recording medium above its Curie temperature to reduce the magnetic coercivity. This allows use of very small grain volume in the medium while still maintaining data thermal stability, and increasing storage density in the next generation hard disk drives (HDDs). In this paper, we review different plasmonic NFT designs that are promising to be applied in HAMR. We focus on the mechanisms contributing to the coupling and confinement of optical energy. We also illustrate the self-heating issue in NFT materials associated with the generation of a confined optical spot, which could result in degradation of performance and failure of components. The possibility of using alternative plasmonic materials will be discussed.

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“…1 This incomprehensive growth has vigorously triggered the development of storage areal density toward 10 Tbit/in 2 that is required to meet the storage demand for such everincreasing global data. 2 Hard disk drive (HDD), 3,4 optical disc drive (ODD), 5,6 and Flash memory 7,8 are currently three primary memory devices for mass storage applications. These three devices are however facing stringent challenge to continue to increase storage capacity while lowering the cost per bit so as to satisfy the growing information demands in zettabytes that are estimated to be increasing at !…”

Section: Introductionmentioning

confidence: 99%

The Route for Ultra-High Recording Density Using Probe-Based Data Storage Device

Wang

Wen

Yang

et al. 2015

NANO

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Phase-change probe memory using Ge 2 Sb 2 Te 5 has been considered as one of the promising candidates as next-generation data storage device due to its ultra-high density, low energy consumption, short access time and long retention time. In order to utmostly mimic the practical setup, and thus fully explore the potential of phase-change probe memory for 10 Tbit/in 2 target, some advanced modeling techniques that include threshold-switching, electrical contact resistance, thermal boundary resistance and crystal nucleation-growth, are introduced into the already-established electrothermal model to simulate the write and read performance of phasechange probe memory using an optimal media stack design. The resulting predictions clearly demonstrate the capability of phase-change probe memory to record 10 Tbit/in 2 density under pico Joule energy within micro second period.

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HAMR Recording Limitations and Extendibility

Cited by 100 publications

References 10 publications

Amorphous Cr-Ti Texture-inducing Layer Underlying (002) Textured bcc-Cr alloy Seed Layer for FePt-C Based Heat-assisted Magnetic Recording Media

Amorphous Cr-Ti Texture-inducing Layer Underlying (002) Textured bcc-Cr alloy Seed Layer for FePt-C Based Heat-assisted Magnetic Recording Media

Plasmonic near-field transducer for heat-assisted magnetic recording

The Route for Ultra-High Recording Density Using Probe-Based Data Storage Device

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