Magnetic and R/W properties of CoPt-SiO2 granular media

被引：20

作者：

Kaitsu, I ^{[1
]}

Inomata, A ^{[1
]}

Okamoto, I ^{[1
]}

Shinohara, M ^{[1
]}

机构：

[1] Fujitsu Ltd, File Mem Lab, Atsugi, Kanagawa 2430197, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1998年 / 34卷 / 04期

关键词：

granular; CoPt-alloy; SiO2; rigid disk system; longitudinal magnetic recording media; low noise;

D O I：

10.1109/20.706625

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We fabricated Co80Pt20-SiO2/Cr granular media by sputtering and studied their structure and their magnetic and read/write (R/W) properties while varying the volume ratio of CoPt to SiO2. Transmission electron microscopy (TEM) images revealed that the diameter of CoPt particles increased with an increase in volume ratio. The maximum coercivity (about 2700 Oe) was obtained at 65vol% of CoPt. On the other hand,at over 40vol% of CoPt media, the signal to media noise ratio (S/N-m) rapidly decreased with an increase in the volume ratio. This indicates that media with finer grains exhibit low noise. In the same way, the instability of the magnetization was diminished with an increase in volume. This instability is very sensitive to the grain size of CoPt.

引用

页码：1591 / 1593

页数：3

共 6 条

[1] ABE T, 1994, 18 ANN C MAGN JAP, P437
[2] ANTIGRANULOCYTES MAGNETIC SOLIDS
CHIEN, CL
[J]. JOURNAL OF APPLIED PHYSICS, 1991, 69 (08) : 5267 - 5272
[3] ICHIHARA K, 1996, 20 ANN C MAGN JPN, P195
[4] Magnetic properties and structure of (Co-alloy)-SiO2 granular films
Kaitsu, I
Inomata, A
Okamoto, I
Shinohara, M
[J]. IEEE TRANSACTIONS ON MAGNETICS, 1996, 32 (05) : 3813 - 3815
[5] A MAGNETIC EVALUATION OF INTERACTION AND NOISE CHARACTERISTICS OF CONICR THIN-FILMS
MAYO, PI
OGRADY, K
KELLY, PE
CAMBRIDGE, J
SANDERS, IL
YOGI, T
CHANTRELL, RW
[J]. JOURNAL OF APPLIED PHYSICS, 1991, 69 (08) : 4733 - 4735
[6] ROADMAP FOR 10 GBIT/IN2 MEDIA - CHALLENGES
MURDOCK, ES
SIMMONS, RF
DAVIDSON, R
[J]. IEEE TRANSACTIONS ON MAGNETICS, 1992, 28 (05) : 3078 - 3083

← 1 →