Abstract
The vanadium doping effects on the superconductivity and magnetism of iron pnictides are investigated in Ba(Fe0.92-xCo0.08Vx)2As2 by transport, susceptibility, and neutron scattering measurements. The doping of magnetic impurity V causes a fast suppression of superconductivity with TC reduced at a rate of approximately 7.4 K/1% V. On the other hand, for x ≥ 0.02, long-range C-type antiferromagnetic order is recovered upon V doping, in contrast to the x = 0 sample with no detectable magnetic order. The value of ordered magnetic moments of Ba(Fe0.92-xCo0.08Vx)2As2 follows a domelike evolution versus doping concentration x. A possible Griffiths-type antiferromagnetic region of multiple coexisting phases in the phase diagram of Ba(Fe0.92-xCo0.08Vx)2As2 is identified, in accordance with previous theoretical predictions based on the cooperative behavior of magnetic impurities and conduction electrons mediating the Ruderman-Kittel-Kasuya-Yosida interactions between them.
| Original language | English |
|---|---|
| Article number | 174516 |
| Journal | Physical Review B |
| Volume | 101 |
| Issue number | 17 |
| Online published | 28 May 2020 |
| DOIs | |
| Publication status | Published - May 2020 |
Publisher's Copyright Statement
- COPYRIGHT TERMS OF DEPOSITED FINAL PUBLISHED VERSION FILE: Sheng, J., Li, X., Tian, C., Song, J., Li, X., Sun, G., Xia, T., Wang, J., Liu, J., Xu, D., Zhang, H., Tong, X., Luo, W., Wu, L., Bao, W., & Cheng, P. (2020). Evolution of superconductivity and antiferromagnetic order in Ba(Fe0.92-xCo0.08Vx)2As2. Physical Review B, 101(17), [174516]. https://doi.org/10.1103/PhysRevB.101.174516. The copyright of this article is owned by American Physical Society.