Title:
CO-FE-NI ALLOY FOR SOFT MAGNETIC FILM LAYER IN PERPENDICULAR MAGNETIC RECORDING MEDIUM, SPUTTERING TARGET MATERIAL, AND PERPENDICULAR MAGNETIC RECORDING MEDIUM
Document Type and Number:
WIPO Patent Application WO/2010/143602
Kind Code:
A1
Abstract:
Disclosed is a soft magnetic Co-Fe-Ni alloy for a perpendicular magnetic recording medium, which has excellent saturation magnetic flux density, amorphousness, corrosion resistance and hardness. The Co-Fe-Ni alloy contains, in at%, 70-92% of Co + Fe + Ni (including 0% of Ni), 1-8% of Ta, and more than 7% but 20% or less of B. The composition of the Co-Fe-Ni alloy (expressed in at%) satisfies the following ratios: Co/(Co + Fe + Ni) of 0.1-0.9; Fe/(Co + Fe + Ni) of 0.1-0.65; Ni/(Co + Fe + Ni) of 0-0.35; and B/Ta of 1-8.
Inventors:
SAWADA Toshiyuki (3007, Aza-Ichimonji, Nakashima, Shikama-ku, Himeji-sh, Hyogo 77, 〒6728677, JP)
澤田 俊之 (〒77 兵庫県姫路市飾磨区中島字一文字３００７番地 山陽特殊製鋼株式会社内 Hyogo, 〒6728677, JP)
HASEGAWA Hiroyuki (3007, Aza-Ichimonji, Nakashima, Shikama-ku, Himeji-sh, Hyogo 77, 〒6728677, JP)
澤田 俊之 (〒77 兵庫県姫路市飾磨区中島字一文字３００７番地 山陽特殊製鋼株式会社内 Hyogo, 〒6728677, JP)
HASEGAWA Hiroyuki (3007, Aza-Ichimonji, Nakashima, Shikama-ku, Himeji-sh, Hyogo 77, 〒6728677, JP)
Application Number:
JP2010/059605
Publication Date:
December 16, 2010
Filing Date:
June 07, 2010
Export Citation:
Assignee:
SANYO SPECIAL STEEL CO., LTD. (3007, Aza-Ichimonji Nakashima, Shikama-ku, Himeji-sh, Hyogo 77, 〒6728677, JP)
山陽特殊製鋼株式会社 (〒77 兵庫県姫路市飾磨区中島字一文字３００７番地 Hyogo, 〒6728677, JP)
SAWADA Toshiyuki (3007, Aza-Ichimonji, Nakashima, Shikama-ku, Himeji-sh, Hyogo 77, 〒6728677, JP)
澤田 俊之 (〒77 兵庫県姫路市飾磨区中島字一文字３００７番地 山陽特殊製鋼株式会社内 Hyogo, 〒6728677, JP)
山陽特殊製鋼株式会社 (〒77 兵庫県姫路市飾磨区中島字一文字３００７番地 Hyogo, 〒6728677, JP)
SAWADA Toshiyuki (3007, Aza-Ichimonji, Nakashima, Shikama-ku, Himeji-sh, Hyogo 77, 〒6728677, JP)
澤田 俊之 (〒77 兵庫県姫路市飾磨区中島字一文字３００７番地 山陽特殊製鋼株式会社内 Hyogo, 〒6728677, JP)
International Classes:
G11B5/667; C22C19/07; C22C38/00; C23C14/34; H01F10/13; H01F10/16; H01F41/18
Attorney, Agent or Firm:
KATSUNUMA Hirohito et al. (Kyowa Patent & Law Office, Room 323 Fuji Bldg., 2-3, Marunouchi 3-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)