We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Towards understanding the magnetic properties of the breathing pyrochlore compound Ba<sub>3</sub>Yb<sub>2</sub>Zn<sub>5</sub>O<sub>11</sub>through single-crystal studies.
- Authors
Dissanayake, Sachith; Shi, Zhenzhong; Rau, Jeffrey G.; Bag, Rabindranath; Steinhardt, William; Butch, Nicholas P.; Frontzek, Matthias; Podlesnyak, Andrey; Graf, David; Marjerrison, Casey; Liu, Jue; Gingras, Michel J. P.; Haravifard, Sara
- Abstract
Ba3Yb2Zn5O11 is exceptional among breathing pyrochlore compounds for being in the nearly-decoupled limit where inter-tetrahedron interactions are weak, hosting isolated clusters or molecular magnet-like tetrahedra of magnetic ytterbium (Yb3+) ions. In this work, we present the study carried out on single-crystal samples of the breathing pyrochlore Ba3Yb2Zn5O11, using a variety of magnetometry and neutron scattering techniques along with theoretical modeling. We employ inelastic neutron scattering to investigate the magnetic dynamics as a function of applied field (with respect to both magnitude and direction) down to a temperature of 70 mK, where inelastic scattering reveals dispersionless bands of excitations as found in earlier powder sample studies, in good agreement with a single-tetrahedron model. However, diffuse neutron scattering at zero field and dc-susceptibility at finite field exhibit features suggesting the presence of excitations at low-energy that are not captured by the single tetrahedron model. Analysis of the local structure down to 2 K via pair distribution function analysis finds no evidence of structural disorder. We conclude that effects beyond the single tetrahedron model are important in describing the low-energy, low-temperature physics of Ba3Yb2Zn5O11, but their nature remains undetermined.
- Subjects
INELASTIC neutron scattering; PYROCHLORE; YTTERBIUM; MAGNETIC properties; DISTRIBUTION (Probability theory); NEUTRON scattering; INELASTIC scattering
- Publication
NPJ Quantum Materials, 2022, Vol 7, Issue 1, p1
- ISSN
2397-4648
- Publication type
Article
- DOI
10.1038/s41535-022-00488-w