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Effects of oxygen vacancy on the magnetic properties of Cr-doped SnO2: Density functional investigation

✍ Scribed by Wei Wei; Ying Dai; Meng Guo; Zhenkui Zhang; Baibiao Huang

Publisher: Elsevier Science
Year: 2010
Tongue: English
Weight: 679 KB
Volume: 183
Category: Article
ISSN: 0022-4596
DOI: 10.1016/j.jssc.2010.10.003

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✦ Synopsis

Magnetic properties of Cr-doped SnO 2 and the effects of oxygen vacancy (V O ) on the magnetic properties are examined to understand the origin of ferromagnetism in Cr-doped SnO 2 and explain the observed discrepant phenomena. Cr-doped SnO 2 shows a p-d hopping ferromagnetic interaction that decreases gradually with the increase in Cr-Cr distance. In Cr-doped SnO 2 with V O , ferromagnetic interaction is obviously weakened. Exchange constants indicate that the ferromagnetic exchange interaction in Cr-doped SnO 2 is similar to that in Co-doped SnO 2 , while it is similar to that in Fe-doped SnO 2 and/or undoped SnO 2 with tin vacancy (V Sn ) in the presence of V O .

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