Perpendicular magnetization of epitaxial FePt(001) thin films with high squareness and high coercive force

被引：101
|
作者：
Watanabe, M [1 ]
Homma, M [1 ]
机构：
[1] TOHOKU UNIV, FAC ENGN, AOBA KU, SENDAI, MIYAGI 98077, JAPAN
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1996年 / 35卷 / 10A期
关键词：
FePt; epitaxial film; RF-magnetron sputtering technique; perpendicular magnetization; squareness; coercive force; maximum energy product; polar magnetooptical Kerr rotation;
D O I：
10.1143/JJAP.35.L1264
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Perpendicular magnetized epitaxial FePt(001) thin films were prepared by RF-magnetron sputtering. The long range order parameter S of the FePt layer was found to be similar to 0.9. Very narrow X-ray rocking curves (FWHM < 1 degrees) of the FePt(002) and Pt(200) peaks indicate that both layers are essentially single crystalline. With increasing Pt buffer layer thickness d(Pt), the squareness M(r)/M(S) and coercive force H-C were found to increase to 100% and 7.2 kOe, respectively. The FePt(001) thin film has a \0.58 degrees\ peak at a photon energy of 2,0 eV (630 nm wavelength) in the polar magnetooptical Kerr rotation theta(K) spectrum, which does nob agree with that of the polycrystalline FePt ordered alloy.
引用
收藏
页码：L1264 / L1267
页数：4
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