L10-ordered FePtAg-C granular thin film for thermally assisted magnetic recording media (invited)

L. Zhang; Y. K. Takahashi; K. Hono; B. C. Stipe; J. Y. Juang; M. Grobis

doi:10.1063/1.3536794

L1₀-ordered FePtAg-C granular thin film for thermally assisted magnetic recording media (invited)

L. Zhang, Y. K. Takahashi, K. Hono, B. C. Stipe, J. Y. Juang, M. Grobis

Research output: Contribution to journal › Article › peer-review

66 Citations (Scopus)

Abstract

We studied highly L1₀-ordered FePtAg-C nanogranular film as a potential high-density storage medium in thermally assisted magnetic recording (TAR). A 6.4-nm-thick FePtAg-C film with a perpendicular coercivity of 37 kOe and an average grain size of 6.1 ± 1.8 nm was fabricated on oxidized silicon substrate with a 10 nm MgO interlayer at 450 °C. The time-dependence measurement of remnant coercivity showed the energy barrier of E_b = 7.6 eV ∼300 k_BT at room temperature, meaning the excellent thermal stability for long-term data storage. Static tester experiments on this film using a TAR head demonstrate the feasibility of recording at an areal density of ∼450 Gbits/in.².

Original language	English
Article number	07B703
Journal	Journal of Applied Physics
Volume	109
Issue number	7
DOIs	https://doi.org/10.1063/1.3536794
Publication status	Published - 2011 Apr 1
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "L10-ordered FePtAg-C granular thin film for thermally assisted magnetic recording media (invited)",

abstract = "We studied highly L10-ordered FePtAg-C nanogranular film as a potential high-density storage medium in thermally assisted magnetic recording (TAR). A 6.4-nm-thick FePtAg-C film with a perpendicular coercivity of 37 kOe and an average grain size of 6.1 ± 1.8 nm was fabricated on oxidized silicon substrate with a 10 nm MgO interlayer at 450 °C. The time-dependence measurement of remnant coercivity showed the energy barrier of Eb = 7.6 eV ∼300 kBT at room temperature, meaning the excellent thermal stability for long-term data storage. Static tester experiments on this film using a TAR head demonstrate the feasibility of recording at an areal density of ∼450 Gbits/in.2.",

author = "L. Zhang and Takahashi, {Y. K.} and K. Hono and Stipe, {B. C.} and Juang, {J. Y.} and M. Grobis",

note = "Funding Information: This work was in part supported by World Premier International Research Center Initiative (WPI Initiative) on Materials Nanoarchitronics, MEXT, Japan, Information Storage Industry Consortium (INSIC), and the NEDO project on the Development of Nanobit Technology for Ultra-High Density Magnetic Recording Project (Green IT Project).",

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AU - Zhang, L.

AU - Takahashi, Y. K.

AU - Hono, K.

AU - Stipe, B. C.

AU - Juang, J. Y.

AU - Grobis, M.

N1 - Funding Information: This work was in part supported by World Premier International Research Center Initiative (WPI Initiative) on Materials Nanoarchitronics, MEXT, Japan, Information Storage Industry Consortium (INSIC), and the NEDO project on the Development of Nanobit Technology for Ultra-High Density Magnetic Recording Project (Green IT Project).

PY - 2011/4/1

Y1 - 2011/4/1

N2 - We studied highly L10-ordered FePtAg-C nanogranular film as a potential high-density storage medium in thermally assisted magnetic recording (TAR). A 6.4-nm-thick FePtAg-C film with a perpendicular coercivity of 37 kOe and an average grain size of 6.1 ± 1.8 nm was fabricated on oxidized silicon substrate with a 10 nm MgO interlayer at 450 °C. The time-dependence measurement of remnant coercivity showed the energy barrier of Eb = 7.6 eV ∼300 kBT at room temperature, meaning the excellent thermal stability for long-term data storage. Static tester experiments on this film using a TAR head demonstrate the feasibility of recording at an areal density of ∼450 Gbits/in.2.

AB - We studied highly L10-ordered FePtAg-C nanogranular film as a potential high-density storage medium in thermally assisted magnetic recording (TAR). A 6.4-nm-thick FePtAg-C film with a perpendicular coercivity of 37 kOe and an average grain size of 6.1 ± 1.8 nm was fabricated on oxidized silicon substrate with a 10 nm MgO interlayer at 450 °C. The time-dependence measurement of remnant coercivity showed the energy barrier of Eb = 7.6 eV ∼300 kBT at room temperature, meaning the excellent thermal stability for long-term data storage. Static tester experiments on this film using a TAR head demonstrate the feasibility of recording at an areal density of ∼450 Gbits/in.2.

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L1₀-ordered FePtAg-C granular thin film for thermally assisted magnetic recording media (invited)

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