Magnetic properties of Gd3Cu3Sb4

Here, we investigated Gd3Cu3Sb4 compound, with the focus on its magnetic structure. We performed magnetization and susceptibility measurements and determined X-ray photoelectron spectroscopy valence band spectra. We also performed a detailed density functional theory calculations. We found that collinear antiferromagnetic structure is preferred over the non-collinear one observed earlier in the analogue Ce3Cu3Sb4 compound. The calculated energy of the unit cell is lower, when assuming a collinear scenario, and magnetic measurements seem to also support this result. •Comparison of valence band with calculations for various U parameter values.•Collinear and non-collinear magnetic unit cell.•Pseudogap in density of states at Fermi level.•Magnetization and susceptibility shows AF behaviour.•Spin flop in magnetization curve.