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DOE OSTI · 1781873

Dynamical ground state in the XY pyrochlore Yb2GaSbO7

Sarte, P. M.·Cruz-Kan, K.·Ortiz, B. R.·Hong, K. H.·Bordelon, M. M.·Reig-i-Plessis, D. (ORCID:000000028571527X)·Lee, M. (ORCID:0000000223699913)·Choi, E. S.·Stone, M. B. (ORCID:0000000178849715)·Calder, S. (ORCID:0000000184023741)·Pajerowski, D. M.·Mangin-Thro, L. (ORCID:0000000190264410)·Qiu, Y. (ORCID:0000000328222468)·Attfield, J. P. (ORCID:0000000197633987)·Wilson, S. D. (ORCID:000000033733930X)·Stock, C.·Zhou, H. D.·Hallas, A. M.·Paddison, J. A. M.·Aczel, A. A. (ORCID:0000000319641943)·Wiebe, C. R. (ORCID:0000000236810182)
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Abstract

Abstract The magnetic ground state of the pyrochlore Yb 2 GaSbO 7 has not been established. The persistent spin fluctuations observed by muon spin-relaxation measurements at low temperatures have not been adequately explained for this material using existing theories for quantum magnetism. Here we report on the synthesis and characterisation of Yb 2 GaSbO 7 to revisit the nature of the magnetic ground state. Through DC and AC magnetic susceptibility, heat capacity, and neutron scattering experiments, we observe evidence for a dynamical ground state that makes Yb 2 GaSbO 7 a promising candidate for disorder-induced spin-liquid or spin-singlet behaviour. This state is quite fragile, being tuned to a splayed ferromagnet in a modest magnetic field μ 0 H c ~ 1.5 T.

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75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITYMagnetic materialsMagnetic properties and materials

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Sarte, P. M., Cruz-Kan, K., Ortiz, B. R., Hong, K. H., Bordelon, M. M., Reig-i-Plessis, D. (ORCID:000000028571527X), Lee, M. (ORCID:0000000223699913), Choi, E. S., Stone, M. B. (ORCID:0000000178849715), Calder, S. (ORCID:0000000184023741), Pajerowski, D. M., Mangin-Thro, L. (ORCID:0000000190264410), Qiu, Y. (ORCID:0000000328222468), Attfield, J. P. (ORCID:0000000197633987), Wilson, S. D. (ORCID:000000033733930X), Stock, C., Zhou, H. D., Hallas, A. M., Paddison, J. A. M., Aczel, A. A. (ORCID:0000000319641943), Wiebe, C. R. (ORCID:0000000236810182). 2021-05-05. Dynamical ground state in the XY pyrochlore Yb2GaSbO7. https://doi.org/10.1038/s41535-021-00343-4

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