Frustrated square-lattice antiferromagnets with competing interactions J1 and J2 are prototypical model system to study complex magnetic correlations. For the generalised J1-J2 model including ferromagnetic interactions new spin-liquid and bond-nematic phases are predicted by theory. We have been able to synthesize the compound BaCdVO(PO4)2 and recently proved on D7 that it lies right on the border of a columnar antiferromagnetic phase with the spin-nematic phase. Here we propose to investigate the magnetic excitations of this unique material and characterize the nature of its quantum fluctuations. A way of driving this material right inside the spin-nematic phase is also described. As a future plan, this phase will then be accessible to us with the new 10T option of IN5 in the coming year.