First Order Transition in the Spin Dynamics of Geometrically Frustrated Yb2Ti2O7

J. A. Hodges, P. Bonville, A. Forget +10

Using neutron diffraction, 170Yb Mossbauer and muSR spectroscopies, we have examined the pyrochlore Yb2Ti2O7 where the Yb3+ S'=1/2 ground state has planar anisotropy. Below ~0.24K,…