具有纵向磁各向异性的FePt-Ag纳米复合薄膜。

FePt-Ag nanocomposite thin films with longitudinal magnetic anisotropy.

作者信息

Zhou Y Z, Chen J S, Chow G M, Wang J P

机构信息

Department of Materials Science, National University of Singapore, 119260, Singapore Data Storage Institute, 5 Engineering Drive 1, 117608, Singapore.

出版信息

J Nanosci Nanotechnol. 2004 Sep;4(7):704-7. doi: 10.1166/jnn.2004.089.

DOI:10.1166/jnn.2004.089

PMID:15570947

Abstract

A well-controlled method to fabricate FePt thin films with the (200) texture and longitudinal magnetic anisotropy for high-density magnetic recording media is reported. FePt-Ag nanocomposite thin films with L1(0) ordered FePt grains embedded in an Ag matrix were deposited on the Cr90Ru10/glass by co-sputtering from Ag and FePt targets. The Ag doping suppressed the (001) texture but improved the L1(0) FePt (200) texture. The magnetic easy axis of FePt-Ag thin films changed from perpendicular to longitudinal in direction. In-plane coercivity of the films varied from 0.8 kOe to 6.5 kOe, depending on Ag contents in the films and under-layer thickness. The change from the (001) to (200) texture could be due to the competition of grain-boundary energy and epitaxial-strain energy.

摘要

报道了一种用于制造具有（200）织构和纵向磁各向异性的FePt薄膜以用于高密度磁记录介质的良好控制方法。通过从Ag和FePt靶材共溅射，将具有嵌入Ag基体中的L1(0)有序FePt晶粒的FePt-Ag纳米复合薄膜沉积在Cr90Ru10/玻璃上。Ag掺杂抑制了（001）织构，但改善了L1(0) FePt（200）织构。FePt-Ag薄膜的磁易轴方向从垂直变为纵向。薄膜的面内矫顽力根据薄膜中的Ag含量和底层厚度在0.8 kOe至6.5 kOe之间变化。从（001）织构到（200）织构的变化可能是由于晶界能和外延应变能的竞争。