Magnetic properties and L1 0 phase formation of FePt films prepared by high current-density ion-beam irradiation and rapid thermal annealing methods

T. Yokota, M. L. Yan, Yingfan Xu, L. Gao, R. Zhang, L. Nicholl, L. Yuan, R. Skomski, David J Sellmyer, Sy-Hwang Liou, Chih Huang Lai, Cheng Han Yang, Sheng Huang Huang

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Abstract

We investigated magnetic properties and L 10 phase formation of FePt films by rapid thermal annealing (RTA) and high current-density ion-beam irradiation. The sample prepared by RTA at 550°C has (001) texture and strong magnetic perpendicular anisotropy with Hc equal to 6 kOe. The sample irradiated at 5.04 μA cm2 has Hc equal to 10 kOe but has isotropic magnetic properties due to the (111) texture. The magnetic correlation length of the ion-irradiated sample was about twice as large as that of the RTA sample. This may be due to the inhomogeneity of the L 10 phase formation in the ion-irradiated film.

Original languageEnglish (US)
Article number10H306
JournalJournal of Applied Physics
Volume97
Issue number10
DOIs
StatePublished - May 15 2005

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high current
ion beams
current density
magnetic properties
irradiation
annealing
textures
ions
inhomogeneity
anisotropy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Magnetic properties and L1 0 phase formation of FePt films prepared by high current-density ion-beam irradiation and rapid thermal annealing methods. / Yokota, T.; Yan, M. L.; Xu, Yingfan; Gao, L.; Zhang, R.; Nicholl, L.; Yuan, L.; Skomski, R.; Sellmyer, David J; Liou, Sy-Hwang; Lai, Chih Huang; Yang, Cheng Han; Huang, Sheng Huang.

In: Journal of Applied Physics, Vol. 97, No. 10, 10H306, 15.05.2005.

Research output: Contribution to journalArticle

Yokota, T. ; Yan, M. L. ; Xu, Yingfan ; Gao, L. ; Zhang, R. ; Nicholl, L. ; Yuan, L. ; Skomski, R. ; Sellmyer, David J ; Liou, Sy-Hwang ; Lai, Chih Huang ; Yang, Cheng Han ; Huang, Sheng Huang. / Magnetic properties and L1 0 phase formation of FePt films prepared by high current-density ion-beam irradiation and rapid thermal annealing methods. In: Journal of Applied Physics. 2005 ; Vol. 97, No. 10.
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AU - Yokota, T.

AU - Yan, M. L.

AU - Xu, Yingfan

AU - Gao, L.

AU - Zhang, R.

AU - Nicholl, L.

AU - Yuan, L.

AU - Skomski, R.

AU - Sellmyer, David J

AU - Liou, Sy-Hwang

AU - Lai, Chih Huang

AU - Yang, Cheng Han

AU - Huang, Sheng Huang

PY - 2005/5/15

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AB - We investigated magnetic properties and L 10 phase formation of FePt films by rapid thermal annealing (RTA) and high current-density ion-beam irradiation. The sample prepared by RTA at 550°C has (001) texture and strong magnetic perpendicular anisotropy with Hc equal to 6 kOe. The sample irradiated at 5.04 μA cm2 has Hc equal to 10 kOe but has isotropic magnetic properties due to the (111) texture. The magnetic correlation length of the ion-irradiated sample was about twice as large as that of the RTA sample. This may be due to the inhomogeneity of the L 10 phase formation in the ion-irradiated film.

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