# Effects of Vanadium doping on BaFe2As2

## TL;DR

This study explores how vanadium doping affects the structural, magnetic, and electronic properties of BaFe2As2, revealing an avoided quantum critical point and spin glass behavior without inducing superconductivity.

## Contribution

It demonstrates that vanadium doping in BaFe2As2 leads to an avoided quantum critical point and spin glass state, extending previous findings from Co/Ni doping to non-superconducting samples.

## Key findings

- Vanadium doping causes strong hole-doping effects.
- Antiferromagnetic and structural transitions are suppressed with doping.
- Spin glass behavior emerges near the critical doping level.

## Abstract

We report an investigation of the structural, magnetic and electronic properties of Ba(Fe(1-x)V(x))2As2 using x-ray, transport, magnetic susceptibility and neutron scattering measurements. The vanadium substitutions in Fe sites are possible up 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 structural 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(Fe(1-x)V(x))2As2.