%0 journal article
%@ 2469-9950
%A Skoulatos, M.,Rucker, F.,Nilsen, J.,Bertin, A.,Pomjakushina, E.,Ollivier, J.,Pfleiderer, C.,Schneidewind, A.,Georgii, R.,Rüegg, C.,Zaharko, O.,Keller, L.,Shannon, N.,Schmidt, B.,Kriele, A.,Senyshyn, A.,Smerald, A.

%D 2019
%J Physical Review B
%N 1
%P 014405 
%R doi:10.1103/PhysRevB.100.014405
%T Putative spin-nematic phase in BaCdVO(PO4)2
%U https://doi.org/10.1103/PhysRevB.100.014405
1 
%X We report neutron-scattering and ac magnetic susceptibility measurements of the two-dimensional spin-1/2 frustrated magnet BaCdVO(PO4)2. At temperatures well below TN≈1K, we show that only 34% of the spin moment orders in an up-up-down-down stripe structure. Dominant magnetic diffuse scattering and comparison to published muon−spin−rotation measurements indicates that the remaining 66% is fluctuating. This demonstrates the presence of strong frustration, associated with competing ferromagnetic and antiferromagnetic interactions, and points to a subtle ordering mechanism driven by magnon interactions. On applying magnetic field, we find that at T=0.1 K the magnetic order vanishes at 3.8 T, whereas magnetic saturation is reached only above 4.5 T. We argue that the putative high-field phase is a realization of the long-sought bond-spin-nematic state.