Large coercivity and granular structure of CoPt/SiO2 films

被引：35

作者：

Chen, C

Kitakami, O

Okamoto, S

Shimada, Y

Shibata, K

Tanaka, M

机构：

[1] Tohoku Univ, Sci Measurements Res Inst, Sect Solid Stat Electron Phys, Sendai, Miyagi 9808577, Japan

[2] Tohoku Univ, Sci Measurements Res Inst, Sect Surface Sci, Sendai, Miyagi 9808577, Japan

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1999年 / 35卷 / 05期

关键词：

CoPt granular film; coercivity; ordering; L1(0) phase;

D O I：

10.1109/20.800559

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：

By post-annealing the as-prepared CoPt/SiO2 samples with the atomic ratio of Co : Pt = 47.5 : 52.5, high coercivity H-c approximate to 14 kOe was obtained at room temperature. TEM and XRD revealed the ordered fct (L1(0)) structure with the lattice constant ratio c/a=0.97 in the granular films with the average grain size around 10-20 nm. The grain size and packing density effect on coercivity are also discussed.

引用

页码：3466 / 3468

页数：3

共 13 条

[1] Grain growth and ordering kinetics in CoPt thin films
Barmak, K
Ristau, RA
Coffey, KR
Parker, MA
Howard, JK
[J]. JOURNAL OF APPLIED PHYSICS, 1996, 79 (08) : 5330 - 5332
[2] MAGNETOCRYSTALLINE ANISOTROPY AND PHASE-TRANSFORMATION IN CO-PT ALLOY
BOLZONI, F
LECCABUE, F
PANIZZIERI, R
PARETI, L
[J]. IEEE TRANSACTIONS ON MAGNETICS, 1984, 20 (05) : 1625 - 1627
[3] CHEN C, UNPUB PACKING DENSIT
[4] HIGH ANISOTROPY L1(0) THIN-FILMS FOR LONGITUDINAL RECORDING
COFFEY, KR
PARKER, MA
HOWARD, JK
[J]. IEEE TRANSACTIONS ON MAGNETICS, 1995, 31 (06) : 2737 - 2739
[5] DOMAIN STRUCTURE OF ORDERED PLATINUM-COBALT ALLOY
CRAIK, DJ
NUNEZ, F
[J]. PROCEEDINGS OF THE PHYSICAL SOCIETY OF LONDON, 1961, 78 (500): : 225 - &
[6] IBUSUKI T, UNPUB PREPARATION MA
[7] High-density recording capability of granular media composed of Co-Pt grains and SiO2 matrix
Ichihara, K
Kikitsu, A
Yusu, K
Nakamura, F
Ogiwara, H
[J]. IEEE TRANSACTIONS ON MAGNETICS, 1998, 34 (04) : 1603 - 1605
[8] Magnetic and R/W properties of CoPt-SiO2 granular media
Kaitsu, I
Inomata, A
Okamoto, I
Shinohara, M
[J]. IEEE TRANSACTIONS ON MAGNETICS, 1998, 34 (04) : 1591 - 1593
[9] Size effect on the crystal phase of cobalt fine particles
Kitakami, O
Sato, H
Shimada, Y
Sato, F
Tanaka, M
[J]. PHYSICAL REVIEW B, 1997, 56 (21): : 13849 - 13854
[10] Magnetic properties of nanometer-size CoPt particles
Liou, S.H.
Liu, Y.
Malhotra, S.S.
Yu, M.
Sellmyer, D.J.
[J]. Journal of Applied Physics, 1996, 79 (8 pt 2A) : 5060 - 5062

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