Ferromagnetism of FePt3 films induced by ion-beam irradiation

被引：40
|
作者：
Maat, S [1 ]
Kellock, AJ [1 ]
Weller, D [1 ]
Baglin, JEE [1 ]
Fullerton, EE [1 ]
机构：
[1] IBM Corp, Almaden Res Ctr, San Jose, CA 95120 USA
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2003年 / 265卷 / 01期
关键词：
patterned media; ion-beam irradiation; magnetic phase transition; FePt3; epitaxial growth; antiferromagnet;
D O I：
10.1016/S0304-8853(03)00219-1
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We demonstrate that chemically ordered FePt3 films can be altered from non-magnetic to ferromagnetic at room temperature by ion-beam irradiation. Both epitaxial and polycrystalline films were grown in the chemically ordered Ll(2) phase and are non-magnetic at room temperature. Upon irradiation with 700keV N+ ions at a dose of 1 x 10(16) ions/cm(2) the chemical order is destroyed and ferromagnetism is induced. The magnetism of the irradiated film is compared to an as-deposited chemically disordered ferromagnetic FePt3 film by hysteresis, torque, and moment vs. temperature curves. The present results share a common origin to the ferrimagnetic-to-non-magnetic transition observed in CrPt3 films and may have potential application for patterned ferromagnetic structures and for studying exchange biasing of laterally patterned ferromagnetic/antiferromagnetic structures. (C) 2003 Elsevier Science B.V. All rights reserved.
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页码：1 / 6
页数：6
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