NDLI: Reducing the Writing Temperature of Thermal Assisted Media by Controlling the Composition of FePt

Content Provider	IEEE Xplore Digital Library
Author	Yun-Chang Wu Chih-Huang Lai
Copyright Year	1965
Abstract	Twenty-nanometer FePt films with 40% Fe content were deposited on MgO substrates at 300degC. A perfect (001) preferred orientation of FePt L1₀ phase was obtained. After 700degC annealing in vacuum, a room temperature perpendicular anisotropy of as high as 4.5times10⁷ erg/cm³ can be obtained. The Curie temperature of the sample with 40% Fe content is far below the 50% Fe sample, which can effectively reduce the temperature of the thermal writing process. Furthermore, decay of magnetic anisotropy energy (K_u) is much faster than saturated magnetization (M_s) with rising temperature, which results in a domination of demagnetization (DM) energy at high temperature. Therefore, a further reduction of the switching field can be achieved. Finally, the films show almost the same magnetic properties during 10 times thermal writing processes from 25degC to 300degC, implying this media has high reliability for thermal writing process
Sponsorship	IEEE Magnetics Society
Starting Page	822
Ending Page	824
Page Count	3
File Size	122196
File Format	PDF
ISSN	00189464
Volume Number	43
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Writing Temperature control Iron Annealing Anisotropic magnetoresistance Magnetic anisotropy Magnetization Demagnetization Delta modulation Magnetic films thermal writing FePt with 40% Fe content MgO substrate perpendicular anisotropy
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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