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Behavior of the Breathing Pyrochlore Lattice Ba3Yb2Zn5O11 in Applied Magnetic Field



J. G. Rau, L. S. Wu, A. F. May, A. E. Taylor, I-Lin Liu, J. Higgins, Nicholas Butch, K. A. Ross, H. S. Nair, M. D. Lumsden, M. J. P. Gingras, A. D. Christianson


The breathing pyrochlore lattice material Ba3Yb2Zn5O11 exists in the nearly decoupled limit, in contrast to most other well-studied breathing pyrochlore compounds. Here we study the magnetic field dependent behavior of Ba3Yb2Zn5O11 at low temperatures as a further probe of the physics of this model system. Experimentally, we consider the behavior of pollycrystalline samples of Ba3Yb2Zn5O11 with a combination inelastic neutron scattering and heat capacity measurements down to 75 mK and up to fields of 10 T. Consistent with previous work the inelastic neutron scattering finds a level crossing near 3 T, but no significant dispersion of the spin excitations is detected up to the highest applied fields. Refinement of the theoretical model determined at zero field can reproduce much of the inelastic neutron scattering spectra and specific heat data. A notable exception is a low temperature peak in the specific heat at 0.1 K. This may indicate the scale of interactions between tetrahedra or may reflect undetected disorder in Ba3Yb2Zn5O11.
Journal of Physics: Condensed Matter


frustrated magnetism


Rau, J. , Wu, L. , May, A. , Taylor, A. , Liu, I. , Higgins, J. , Butch, N. , Ross, K. , Nair, H. , Lumsden, M. , Gingras, M. and Christianson, A. (2018), Behavior of the Breathing Pyrochlore Lattice Ba<sub>3</sub>Yb<sub>2</sub>Zn<sub>5</sub>O<sub>11</sub> in Applied Magnetic Field, Journal of Physics: Condensed Matter, [online], (Accessed July 15, 2024)


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Created October 18, 2018, Updated October 12, 2021