Unexpectedly wide reversible vortex region in $β$-pyrochlore RbOs$_{2}$O$_{6}$

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dc.creatorLegendre, Pierre
dc.creatorFasano, Yanina
dc.creatorMaggio-Aprile, Ivan
dc.creatorFischer, Øystein
dc.creatorBukowski, Zbigniew
dc.creatorKatrych, Sergiy
dc.creatorKarpinski, Janusz
dc.date2008-06-20
dc.date2008-08-26
dc.date.accessioned2026-07-07T09:58:05Z
dc.date.available2026-07-07T09:58:05Z
dc.descriptionWe study the extent of the reversible region in the vortex phase diagram of recently available RbOs$_2$O$_6$ single crystals \cite{Rogacki08a} by means of bulk magnetization measurements. We found that the irreversible magnetic response sets in at a field $H_{\rm irr}(T) \sim 0.3 H_{\rm c2}(T)$ for $0.5 \lesssim T/T_{\rm c} \lesssim 0.8$, yielding a reversible vortex region that is uncommonly wide in comparison with typical low-$T_{\rm c}$ materials. The relevance of thermal fluctuations is limited since we estimate a Ginzburg number $G_{\rm i} = 5 \times 10^{-7}$. However, the relevance of quenched disorder is unconventionally low since the critical-current density ratio at low fields and temperatures is of the order of that found in high-T$_{\rm c}$'s. We therefore conclude that an intrinsically low bulk pinning magnitude favors the existence of an unexpectedly wide reversible vortex region that seems to be generic to $β$-pyrochlores.
dc.identifierhttps://arxiv.org/abs/0806.3346
dc.identifierhttp://arxiv.org/abs/0806.3346
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/167584
dc.subjectSuperconductivity
dc.titleUnexpectedly wide reversible vortex region in $β$-pyrochlore RbOs$_{2}$O$_{6}$
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