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

Guang Han Cao*, Zhifeng Ma, Cao Wang, Yunlei Sun, Jinke Bao, Shuai Jiang, Yongkang Luo, Chunmu Feng, Yi Zhou, Zhi Xie, Fengchun Hu, Shiqiang Wei, I. Nowik, I. Felner, Lei Zhang, Zhu'An Xu, Fu Chun Zhang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Scopus citations

Abstract

We have studied a quinary Fe-based superconductor Sr2 VFeAsO3 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 VO 2 planes are discussed based on mixed valence of V3+ and V4+.

Original languageEnglish
Article number104518
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number10
DOIs
StatePublished - 22 Sep 2010

Fingerprint

Dive into the research topics of 'Self-doping effect and successive magnetic transitions in superconducting Sr2 VFeAsO3'. Together they form a unique fingerprint.

Cite this