SnO2 doped with Mn, Fe or Co:: Room temperature dilute magnetic semiconductors

被引：186

作者：

Fitzgerald, CB ^{[1
]}

Venkatesan, M

Douvalis, AP

Huber, S

Coey, JMD

Bakas, T

机构：

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

[2] Univ Ioannina, Dept Phys, GR-45110 Ioannina, Greece

来源：

JOURNAL OF APPLIED PHYSICS | 2004年 / 95卷 / 11期

关键词：

D O I：

10.1063/1.1676026

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Room temperature ferromagnetism is found in (Sn1-xMx)O-2 (M=Mn, Fe, Co, x=0.05) ceramics where x-ray diffraction confirms the formation of a rutile-structure phase. Room temperature saturation magnetization of 0.2 and 1.8 Am2 kg-1 for (Sn0.95Mn0.05)O-2 and (Sn0.95Fe0.05)O-2, respectively, corresponds to a moment of 0.11 or 0.95 mu(B) per Mn or Fe atom. The Curie temperatures are 340 and 360 K, respectively. The magnetization cannot be attributed to any identified impurity phase. Fe-57 Mossbauer spectra of the Fe-doped SnO2 samples, recorded at room temperature and 16 K, show that about 85% of the iron is in a magnetically ordered high spin Fe3+ state, the remainder being paramagnetic. (C) 2004 American Institute of Physics.

引用

页码：7390 / 7392

页数：3

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