Publication Details

Cao, G., Ma, Z., Wang, C., Sun, Y., Bao, J., Jiang, S., Luo, Y., Feng, C., Zhou, Y., Xie, Z., Hu, F., Wei, S., Nowik, I., Felner, I., Zhang, L., Xu, Z. & Zhang, F. (2010). Self-doping effect and successive magnetic transitions in superconducting Sr2VFeAsO3. Physical Review B: Condensed Matter and Materials Physics, 82 (10), 104518-1-104518-5.


We have studied a quinary Fe-based superconductor Sr2VFeAsO3 by the measurements of x-ray diffraction, x-ray absorption, Mössbauer spectrum, resistivity, magnetization, and specific heat. This apparently undoped oxyarsenide is shown to be self-doped via electron transfer from the V3+ ions. We observed successive magnetic transitions within the VO2 layers: an antiferromagnetic transition at 150 K followed by a weak ferromagnetic transition at 55 K. The spin orderings within the VO2 planes are discussed based on mixed valence of V3+ and V4+.

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