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Self-doping effect and successive magnetic transitions in superconducting Sr2 VFeAsO3

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posted on 2024-11-15, 11:57 authored by Guanghan Cao, Zhifeng Ma, Cao Wang, Yunlei Sun, Jinke Bao, Shuai Jiang, Yi Luo, Chunmu Feng, Yi Zhou, Zhi Xie, Fengchun Hu, Shiqiang Wei, I Nowik, I Felner, Lei Zhang, Zhu-An Xu, Fu-Chun Zhang
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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Citation

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.

Journal title

Physical Review B

Volume

82

Issue

10

Pagination

104518

Publisher website/DOI

Language

English

RIS ID

69812

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    Keywords

    dopingeffectsuccessiveselfmagneticvfeaso3transitionssuperconductingsr2

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