Title:
THERMALLY ASSISTED MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/096472
Kind Code:
A1
Abstract:
Disclosed is a thermally assisted magnetic recording medium comprising a substrate, a plurality of undercoat layers formed on the substrate, and a magnetic layer which comprises, as the main component, an alloy having an L10 structure, wherein at least one of the undercoat layers comprises MgO as a main component and contains at least one oxide selected from among SiO2, TiO2, Cr2O3, Al2O3, Ta2O5, ZrO2, Y2O3, CeO2, MnO, TiO, and ZnO. The thermally assisted recording medium has such properties that the magnetic grains have an exceedingly small diameter, the exchange coupling among the magnetic grains is sufficiently weak, and the dispersion of coercive force is low.
Inventors:
KANBE, Tetsuya (5-1 Yawata Kaigan dori, Ichihara-sh, Chiba 67, 〒2900067, JP)
神邊 哲也 (〒67 千葉県市原市八幡海岸通５－１ 昭和電工エレクトロニクス株式会社内 Chiba, 〒2900067, JP)
HASHIMOTO, Atsushi (5-1 Yawata Kaigan dori, Ichihara-sh, Chiba 67, 〒2900067, JP)
神邊 哲也 (〒67 千葉県市原市八幡海岸通５－１ 昭和電工エレクトロニクス株式会社内 Chiba, 〒2900067, JP)
HASHIMOTO, Atsushi (5-1 Yawata Kaigan dori, Ichihara-sh, Chiba 67, 〒2900067, JP)
Application Number:
JP2011/052238
Publication Date:
August 11, 2011
Filing Date:
February 03, 2011
Export Citation:
Assignee:
SHOWA DENKO K.K. (13-9, Shibadaimon 1-chome Minato-k, Tokyo 18, 〒1058518, JP)
昭和電工株式会社 (〒18 東京都港区芝大門一丁目１３番９号 Tokyo, 〒1058518, JP)
KANBE, Tetsuya (5-1 Yawata Kaigan dori, Ichihara-sh, Chiba 67, 〒2900067, JP)
神邊 哲也 (〒67 千葉県市原市八幡海岸通５－１ 昭和電工エレクトロニクス株式会社内 Chiba, 〒2900067, JP)
昭和電工株式会社 (〒18 東京都港区芝大門一丁目１３番９号 Tokyo, 〒1058518, JP)
KANBE, Tetsuya (5-1 Yawata Kaigan dori, Ichihara-sh, Chiba 67, 〒2900067, JP)
神邊 哲也 (〒67 千葉県市原市八幡海岸通５－１ 昭和電工エレクトロニクス株式会社内 Chiba, 〒2900067, JP)
International Classes:
G11B5/738; G11B5/02; G11B5/64; G11B5/65
Attorney, Agent or Firm:
UCHIDA, Yukio (Uchida & Associates, Sunny Port Shiba 1005 5-10, Shiba 2-chome, Minato-k, Tokyo 14, 〒1050014, JP)
Claims: