Evidence of carrier mediated room temperature ferromagnetism in transparent semiconducting Sn1−xCoxO2−δ thin films
作者： K Gopinadhan , Subhash C Kashyap , Dinesh K Pandya , Sujeet Chaudhary
DOI: 10.1088/0953-8984/20/12/125208
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摘要: Magnetic ordering in Co-substituted spray pyrolyzed SnO2 thin films has been investigated by magneto-transport studies of Sn1−xCoxO2−δ and F co-doped films. The free carrier concentration room temperature ferromagnetism induced with cobalt concentrations up to x = 0.10 are found be closely related each other. Both the saturation magnetic moment increase monotonically Co, attain maximum values 2.2 × 1019 cm−3 0.26 μB/Co-ion, respectively, at 0.10. substitution O2− F− (nearly 10 atomic percent (a/o)) resulted much higher both (2.07 1020 cm−3) (0.80 μB/Co-ion). Also, anomalous behavior Hall effect observed. mediated interaction is proposed most probable mechanism responsible for these dependence magnetization predicts a Curie exceeding 573 K. All optically transparent (>75%) visible spectral region.
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