Room temperature ferromagnetism in Fe-doped BaSnO3

被引：55
作者：
Balamurugan, K.
Kumar, N. Harish
Chelvane, J. Arout [2 ]
Santhosh, P. N. [1 ]
机构：
[1] Indian Inst Technol, Low Temp Lab, Dept Phys, Madras 600036, Tamil Nadu, India
[2] Def Met Res Lab, Adv Magnet Grp, Hyderabad 500058, Andhra Pradesh, India
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 472卷 / 1-2期
关键词：
Oxide materials; Solid-state reactions; Exchange and superexchange; Electron paramagnetic resonance; DILUTED MAGNETIC SEMICONDUCTORS; BULK;
D O I：
10.1016/j.jallcom.2008.04.096
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Polycrystalline bulk samples of BaSn1-xFexO3, with x=0.03, 0.04 and 0.05 were prepared by solid-state reaction method. These Fe-doped BaSnO3 systems exhibit ferromagnetism at room temperature with an average magnetic moment of 0.047, 0.038 and 0.025 mu(B)/F-e and Curie temperature of 510, 462 and 446 K, respectively. The observed magnetic properties are not attributed to any of the known impurity phases or clusters. The presence of ferromagnetic interaction at room temperature is supported by the ferromagnetic resonance (FMR) signals observed in the electron spin resonance spectra. The ferromagnetic order between Fe-ions is expected to be mediated by an electron trapped at the oxygen anion vacancy, called the F-centre exchange (FCE) interaction. (C) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：9 / 12
页数：4
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