NDLI: Magnetic Property Enhancement of FePt Films by Zr Underlayering

Content Provider	IEEE Xplore Digital Library
Author	Shen, C.Y. Chang, H.W. Yuan, F.T. Lin, M.C. Su, C.C. Wang, C.R. Mei, J.K. Chen, C.C. Chang, W.C.
Copyright Year	1965
Abstract	Structure and magnetic properties of the sputter-prepared FePt (160 nm) and FePt(160 nm)/Zr(10 nm) are studied. The films were deposited at room temperature and followed by a post annealing for magnetic hardening by L10-ordering. Distinct ordering processes are observed. In FePt films, extensive ordering occurs after annealing at Ta=700 ^°C and forms strong (111) texture. Hc increases to 8.5 kOe with a decrease in Mr of about 10%. In contrast, FePt/Zr samples orders at Ta=500 ^°C and results in drastic increase in Hc reaching 12.5 kOe with only 2.7% decrease in Mr. The difference in surface morphology of the two samples suggests that the low temperature ordering is a result of the nucleation promotion by Zr underlayer. The refined grain size strengthens the intergrain coupling resulting in greatly enhanced magnetic properties. The value of (BH)max for the film with Ta=500, 600, and 700 ^°C are 16.8, 20.0, and 19.6 MGOe, respectively. The maximum value is more than 110% higher than that of the FePt film annealed at Ta=700 ^°C (9.5 MGOe).
Sponsorship	IEEE Magnetics Society
Starting Page	1
Ending Page	4
Page Count	4
File Size	1272650
File Format	PDF
ISSN	00189464
Volume Number	50
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Zirconium Perpendicular magnetic anisotropy Annealing Soft magnetic materials Magnetic properties Magnetic domains magnetic thin films Energy product FePt
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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