(001)-oriented FePt/Ag composite films for perpendicular recording
来源期刊：Acta Metallurgica Sinica2009年第5期
论文作者：Fang WANG Xiaohong XU Wenfeng LIU
Key words：FePt/Ag thin films; (001) orientation; FePt magnetic layer; Ag underlayer; Intergrain interaction;
Abstract: FePt/Ag thin films were deposited by magnetron sputtering onto 7059 glass substrates, then were annealed at 550 ℃ for 30 min. Nanostructured FePt/Ag films were successfully obtained with the magnetic easy axis of Ll_0 FePt perpendicular to the film plane. It was found that the development of (001) texture depended strongly on the thicknesses of FePt magnetic layer and Ag underlayer. The L10 ordered FePt(15 nm)/Ag(50 nm) with (001) orientation can be obtained. And the perpendicular coercivity of FePt(15 nm)/Ag(50 nm) film reached to 7.2×10~5 A/m, whereas the longitudinal one was only 3.2×10~4 A/m. The non-magnetic Ag underlayer can not only induce (001) orientation and ordering of FePt grains, but also reduce the intergrain interactions.
Fang WANG1，Xiaohong XU1，Wenfeng LIU2
(1.School of Chemistry and Materials Science, Shanxi Normal University, Linfen 041004, China;
2.College of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China)
Abstract:FePt/Ag thin films were deposited by magnetron sputtering onto 7059 glass substrates, then were annealed at 550 ℃ for 30 min. Nanostructured FePt/Ag films were successfully obtained with the magnetic easy axis of Ll_0 FePt perpendicular to the film plane. It was found that the development of (001) texture depended strongly on the thicknesses of FePt magnetic layer and Ag underlayer. The L10 ordered FePt(15 nm)/Ag(50 nm) with (001) orientation can be obtained. And the perpendicular coercivity of FePt(15 nm)/Ag(50 nm) film reached to 7.2×10~5 A/m, whereas the longitudinal one was only 3.2×10~4 A/m. The non-magnetic Ag underlayer can not only induce (001) orientation and ordering of FePt grains, but also reduce the intergrain interactions.
Key words:FePt/Ag thin films; (001) orientation; FePt magnetic layer; Ag underlayer; Intergrain interaction;
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