Ferromagnetism in Fe-doped SnO2 thin films

被引：895

作者：

Coey, JMD ^{[1
]}

Douvalis, AP ^{[1
]}

Fitzgerald, CB ^{[1
]}

Venkatesan, M ^{[1
]}

机构：

[1] Trinity Coll Dublin, Dept Phys, Dublin 2, Ireland

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 08期

关键词：

D O I：

10.1063/1.1650041

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Thin films grown by pulsed-laser deposition from targets of Sn0.95Fe0.05O2 are transparent ferromagnets with Curie temperature and spontaneous magnetization of 610 K and 2.2 A m(2) kg(-1), respectively. The Fe-57 Mossbauer spectra show the iron is all high-spin Fe3+ but the films are magnetically inhomogeneous on an atomic scale, with only 23% of the iron ordering magnetically. The net ferromagnetic moment per ordered iron ion, 1.8 mu(B), is greater than for any simple iron oxide with superexchange interactions. Ferromagnetic coupling of ferric ions via an electron trapped in a bridging oxygen vacancy (F center) is proposed to explain the high Curie temperature. (C) 2004 American Institute of Physics.

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页码：1332 / 1334

页数：3

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