Effects of vanadium doping on BaFe2As2

We report an investigation of the structural, magnetic and electronic properties of Ba(Fe1_xVx)(2)As2 using x-ray, transport, magnetic susceptibility and neutron scattering measurements. The vanadium substitutions in Fe sites arc possible up to similar to 40%. Hall effect measurements indicate strong hole-doping effect through V doping, while no superconductivity is observed in all samples down to 2K. The antiferromagnetic and struct,nral transition temperature of BaFe2As2 is gradually suppressed to finite temperature, then vanishes at x = 0.245 with the emergence of spin glass behavior, suggesting an avoided quantum critical point (QCP). Our results demonstrate that the avoided QCP and spin glass state which were previously reported in the superconducting phase of Co/Ni-doped BaFe2As2 can also be realized in non-superconducting Ba(Fe1-xVx)(2)As-2. Copyright (C) EPLA, 2018