Ordering enhancement of Cu underlayer on CoPt thin films

被引：17

作者：

Liao, WM ^{[1
]}

Lin, YP ^{[1
]}

Yuan, FT ^{[1
]}

Chen, SK ^{[1
]}

机构：

[1] Feng Chia Univ, Dept Mat Sci, Taichung 407, Taiwan

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2004年 / 272卷

关键词：

Cu underlayer; ordering enhancements; CoPt;

D O I：

10.1016/j.jmmm.2003.12.900

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have studied the Cu underlayer effect using CoPt (90 nm)/Cu (10 nm) films. For both the bi-layer CoPt/Cu and the single-layer CoPt samples annealed at 650degreesC for 10 min, the former exhibits stronger X-ray diffraction peaks of ordered CoPt phase. The coercivity of the CoPt/Cu film is about two times as large as the single-layer CoPt. The higher coercivity can be attributed to the ordering enhancement by Cu underlayer. The deltaM value of CoPt/Cu film is 60% smaller than that of single-layer CoPt. It appears that Cu underlayer significantly decreases exchange coupling in the CoPt/Cu film. (C) 2004 Elsevier B.V. All rights reserved.

引用

收藏

页码：2175 / 2177

页数：3

相关论文

共 13 条

[1] MAGNETOOPTICAL DELTA-M MEASUREMENTS OF INTERACTIONS IN ELECTROPLATED COPT FILMS [J].

CALLEGARO, L ;

PUPPIN, E ;

CAVALLOTTI, PL ;

LECIS, N ;

ZANGARI, G .

JOURNAL OF APPLIED PHYSICS, 1995, 78 (01) :457-459

[2] Long-range atomic ordering and magnetic properties of Co1-xPtx/SiO2 granular films [J].

Chen, C ;

Kitakami, O ;

Okamoto, S ;

Shimada, Y .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :6947-6949

[3] HIGH ANISOTROPY L1(0) THIN-FILMS FOR LONGITUDINAL RECORDING [J].

COFFEY, KR ;

PARKER, MA ;

HOWARD, JK .

IEEE TRANSACTIONS ON MAGNETICS, 1995, 31 (06) :2737-2739

[4] Growth temperature dependence of long-range alloy order and magnetic properties of epitaxial FexPt1-x (x similar or equal to 0.5) films [J].

Farrow, RFC ;

Weller, D ;

Marks, RF ;

Toney, MF ;

Horn, S ;

Harp, GR ;

Cebollada, A .

APPLIED PHYSICS LETTERS, 1996, 69 (08) :1166-1168

[5] Effects of Ag underlayers on the microstructure and magnetic properties of epitaxial FePt thin films [J].

Hsu, YN ;

Jeong, S ;

Laughlin, DE ;

Lambeth, DN .

JOURNAL OF APPLIED PHYSICS, 2001, 89 (11) :7068-7070

[6] Structure and magnetic properties of L10 CoPt(Ag/MgO,MgO) thin films [J].

Jeong, S ;

Hsu, YN ;

McHenry, ME ;

Laughlin, DE .

JOURNAL OF APPLIED PHYSICS, 2000, 87 (09) :6950-6952

[7] Low-temperature ordering of L10-CoPt thin films promoted by Sn, Pb, Sb, and Bi additives [J].

Kitakami, O ;

Shimada, Y ;

Oikawa, K ;

Daimon, H ;

Fukamichi, K .

APPLIED PHYSICS LETTERS, 2001, 78 (08) :1104-1106

[8] Reduction of ordering temperature of an FePt-ordered alloy by addition of Cu [J].

Maeda, T ;

Kai, T ;

Kikitsu, A ;

Nagase, T ;

Akiyama, J .

APPLIED PHYSICS LETTERS, 2002, 80 (12) :2147-2149

[9]

Maykov V. V., 1989, PHYS MET METALLOGR, V67, P76

[10] MAGNETIC PROPERTIES OF PLATINUM COBALT NEAR EQUIATOMIC COMPOSITION .I. EXPERIMENTAL DATA [J].

MCCURRIE, RA ;

GAUNT, P .

PHILOSOPHICAL MAGAZINE, 1966, 13 (123) :567-&