Evidence for competing magnetic instabilities in underdoped $\mathrm{YB}{\mathrm{a}}_2\mathrm{C}{\mathrm{u}}_3{\mathrm{O}}_{6+\mathrm{x}}$

V. Baledent, D. Haug, Y. Sidis +3

We report a polarized neutron scattering study of the orbital-like magnetic order in strongly underdoped $\mathrm{YB}{\mathrm{a}}_2\mathrm{C}{\mathrm{u}}_3{\mathrm{O}}_{6.45}$ and $\mathrm{YB}{\mathrm{a}}_2(\mathrm{C}{\mathrm{u}}_{0.98}\mathrm{Z}{\mathrm{n}}_{0.02}{)}_3{\mathrm{O}}_{6.6}$. T…