Effects of annealing condition on the structural and magnetic properties of FePt thin films

Equiatomic FePt films were deposited by a dc sputtering method and annealed in the air and in a vacuum at 350/spl deg/C for up to 60 min. The order-disorder transformation occurs almost entirely within 10 min and a very high coercivity of 6.8 kOe could be obtained in the air-annealed films while the...

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Veröffentlicht in:	IEEE transactions on magnetics 1999-09, Vol.35 (5), p.3034-3036
Hauptverfasser:	CHANG HOI PARK, JONG GAB NA, PYUNG WOO JANG, LEE, S.-R
Format:	Artikel
Sprache:	eng
Schlagworte:	Annealing Coercive force Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Iron Magnetic analysis Magnetic anisotropy Magnetic films Magnetic properties Magnetic properties and materials Magnetic properties of monolayers and thin films Magnetic properties of surface, thin films and multilayers Perpendicular magnetic anisotropy Physics Sputtering Temperature
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Zusammenfassung:	Equiatomic FePt films were deposited by a dc sputtering method and annealed in the air and in a vacuum at 350/spl deg/C for up to 60 min. The order-disorder transformation occurs almost entirely within 10 min and a very high coercivity of 6.8 kOe could be obtained in the air-annealed films while the transformation occured very slowly in the vacuum-annealed films. This higher transformation rate could be also verified in the X-ray diffraction analysis. The reason for the higher rate seems to be the diffusion of oxygen atoms and possible mechanism was discussed.
ISSN:	0018-9464 1941-0069
DOI:	10.1109/20.801076