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.

引用

页码：1 / 6

页数：6

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