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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<jats:sub>2<\/jats:sub>GaSbO<jats:sub>7<\/jats:sub> 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<jats:sub>2<\/jats:sub>GaSbO<jats:sub>7<\/jats:sub> 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 <jats:italic>\u03bc<\/jats:italic><jats:sub>0<\/jats:sub><jats:italic>H<\/jats:italic><jats:sub>c<\/jats:sub>\u2009~\u20091.5\u2009T.<\/jats:p>","DOI":"10.1038\/s41535-021-00343-4","type":"journal-article","created":{"date-parts":[[2021,5,5]],"date-time":"2021-05-05T10:07:04Z","timestamp":1620209224000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Dynamical ground state in the XY pyrochlore Yb2GaSbO7"],"prefix":"10.1038","volume":"6","author":[{"given":"P. M.","family":"Sarte","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K.","family":"Cruz-Kan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B. 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