Spin and quadrupole correlations by three-spin interaction in the frustrated pyrochlore magnet Tb${}_{2+x}$Ti${}_{2-x}$O${}_{7+y}$

Hiroaki Kadowaki, Mika Wakita, Björn Fåk +2

We have investigated the origin of the magnetic dipole correlations $⟨{\sigma }_{\mathbf{Q}}^z{\sigma }_{-\mathbf{Q}}^z⟩$ characterized by the modulation wave vector $\bolds…