ITE Technical Group Submission System
Conference Paper's Information
Online Proceedings
[Sign in]
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2016-06-09 13:50
Effect of oxide boundary materials on magnetic properties for CoPt-based granular media
Kim Kong Tham, Ryosuke Kushibiki (Tanaka Kikinzoku), Shintaro Hinata, Shin Saito (Tohoku Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) The magnetic properties and structures of Co80Pt20-30 vol% oxide (ZrO2, Cr2O3, Y2O3, Al2O3, MnO, TiO2, WO2, SiO2, Mn3O4, WO3, Co3O4, MoO3, and B2O3) granular media deposited at room temperature were investigated. As a result, the following were found. 1) By employing oxides with low melting point temperatures as the granular media, magnetic grains with high saturation magnetization (Msgrain) and perpendicular magnetic anisotropy (Kugrain) are obtained; the increases in Msgrain and Kugrain are due to the promotion of the columnar growth of magnetic grains and phase separation or two-phase precipitation between magnetic grains and oxides. 2) The increase in the Kugrain of the granular media followed by the decrease in the melting point of oxides is due to the reduction in the amount of stacking faults. 3) Among these granular media, the CoPt-B2O3 granular medium has the highest coercivity (Hc) and ratio of Hc to the magnetic anisotropy field (Hc/Hkgrain) of 8.0 kOe and 0.4, with Msgrain and Kugrain of 1115 emu/cm3 and 1.1×107 erg/cm3. 4) The CoPt-B2O3 granular medium has well-isolated and columnar growth magnetic grains with an average grain size of 6.5 nm.
Keyword (in Japanese) (See Japanese page) 
(in English) Perpendicular magnetic recording / high magneto-crystalline anisotropy / CoPt-B2O3 granular medium / oxide boundary materials / melting point temperature / / /  
Reference Info. ITE Tech. Rep.
Paper #  
Date of Issue  
Download PDF

Conference Information
Committee IEICE-MRIS MMS  
Conference Date 2016-06-09 - 2016-06-10 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Recording Systems, etc. 
Paper Information
Registration To IEICE-MRIS 
Conference Code 2016-06-MR-MMS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Effect of oxide boundary materials on magnetic properties for CoPt-based granular media 
Sub Title (in English)  
Keyword(1) Perpendicular magnetic recording  
Keyword(2) high magneto-crystalline anisotropy  
Keyword(3) CoPt-B2O3 granular medium  
Keyword(4) oxide boundary materials  
Keyword(5) melting point temperature  
1st Author's Name Kim Kong Tham  
1st Author's Affiliation Tanaka Kikinzoku Kogyo K. K. (Tanaka Kikinzoku)
2nd Author's Name Ryosuke Kushibiki  
2nd Author's Affiliation Tanaka Kikinzoku Kogyo K. K. (Tanaka Kikinzoku)
3rd Author's Name Shintaro Hinata  
3rd Author's Affiliation Tohoku Univ. (Tohoku Univ.)
4th Author's Name Shin Saito  
4th Author's Affiliation Tohoku Univ. (Tohoku Univ.)
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
Speaker Author-1 
Date Time 2016-06-09 13:50:00 
Presentation Time 25 minutes 
Registration for IEICE-MRIS 
Paper #  
Volume (vol) vol.40 
Number (no)  
Date of Issue  

[Return to Top Page]

[Return to ITE Web Page]

The Institute of Image Information and Television Engineers (ITE), Japan