Evolution of superconductivity and antiferromagnetic order in Ba(Fe0.92−xCo0.08Vx)2As2
Jieming Sheng, Xingguang Li, Congkuan Tian, Jianming Song, Xin Li, Guangai Sun, Tianlong Xia, Jinchen Wang, Juanjuan Liu, Daye Xu, Hongxia Zhang, Xin Tong, Wei Luo, Liusuo Wu, Wei Bao, Peng Cheng
DOI 10.1103/PhysRevB.101.174516 · Physical Review B
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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.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Ba(Fe0.92-xCo0.08Vx)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Ba(Fe0.92Co0.08)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 22 | Pressure not reported | onset |
| Ba(Fe0.92Co0.08)2As2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 22 | Pressure not reported | zero_resistance |
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