3d-electron Heisenberg pyrochlore Mn₂Sb₂O₇
Publikation: Beitrag in Fachzeitschrift › Forschungsartikel › Beigetragen › Begutachtung
Beitragende
Abstract
In frustrated magnetic systems, geometric constraints or the competition among interactions introduce extremely high degeneracy and prevent the system from readily selecting a low-temperature ground state. The most frustrated known spin arrangement is on the pyrochlore lattice, but nearly all magnetic pyrochlores have unquenched orbital angular momenta, constraining the spin directions through spin-orbit coupling. Pyrochlore Mn₂Sb₂O₇ is an extremely rare Heisenberg pyrochlore system with directionally unconstrained spins and low chemical disorder. We show that it undergoes a spin-glass transition at 5.5 K, which is suppressed by disorder arising from Mn vacancies, indicating this ground state to be a direct consequence of the spins' interactions. The striking similarities to 3d transition-metal pyrochlores with unquenched angular momenta suggests that the low spin-orbit coupling in the 3d block makes Heisenberg pyrochlores far more accessible than previously imagined.
Details
Originalsprache | Englisch |
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Aufsatznummer | 174431 |
Fachzeitschrift | Physical review. B |
Jahrgang | 94 |
Publikationsstatus | Veröffentlicht - 21 Nov. 2016 |
Peer-Review-Status | Ja |
Extern publiziert | Ja |
Externe IDs
Scopus | 84998890601 |
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