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Competition Between the Inter- and Intra-sublattice Interactions in Yb2V2O7



Z. L. Dun, J. Ma, H. B. Cao, Yiming Qiu, John R. Copley, T. Hong, M. Matsuda, J. G. Cheng, M. Lee, E. S. Choi, S. Johnston, H. D. Zhou


We studied single crystals of Yb2V2O7 using dc and ac susceptibility measurements, elastic and inelastic neutron scattering measurements, and linear spin wave theory. The experimental data shows a ferromagnetic ordering of V4+ ions at 70 K, a short-range ordering of Yb3+ ions below 40 K, and finally a long-range non-collinear ordering of Yb3+ ions below 15 K. With external magnetic field oriented along the [111] axis, the Yb-sublattice experiences a slip flop transition related to the "three-in one-out" spin structure. By modeling the spin wave excitations, we extract the Hamiltonian parameters. Our results confirm that although the extra inter-sublattice Yb-Yb interactions, based on the pyrochlore lattice, still stabilize the Yb ions' non-collinear spin structure and spin flop transition.
Physical Review B


geometrical frustration, neutron scattering


Dun, Z. , Ma, J. , Cao, H. , Qiu, Y. , Copley, J. , Hong, T. , Matsuda, M. , Cheng, J. , Lee, M. , Choi, E. , Johnston, S. and Zhou, H. (2015), Competition Between the Inter- and Intra-sublattice Interactions in Yb<sub>2</sub>V<sub>2</sub>O<sub>7</sub>, Physical Review B, [online], (Accessed April 13, 2024)
Created February 26, 2015, Updated October 12, 2021