Observation of spin freezing and relaxation at microwave frequencies in the spin ladder compound $Sr_{14-x}Ca_{x}Cu_{24}O_{41}$

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dc.creatorZhai, Z.
dc.creatorPatanjali, P. V.
dc.creatorHakim, N.
dc.creatorSokoloff, J. B.
dc.creatorSridhar, S.
dc.creatorAmmerahl, U.
dc.creatorVietkine, A.
dc.creatorRevcolevschi, A.
dc.date1999-03-12
dc.date.accessioned2026-07-07T03:13:01Z
dc.date.available2026-07-07T03:13:01Z
dc.descriptionWe report the observation of a frequency ($ω$) and temperature (T) -dependent loss peak in $χ''$ and accompanying dispersion in $χ'$ from microwave (2-18GHz) measurements of the complex susceptibility $\tildeχ(ω, T)=χ'+iχ''$ of $Sr_{14-x}Ca_{x}Cu_{24}O_{41}$. We associate this phenomenon with a rapid decrease of spin disorder and corresponding spin relaxation rate, representing a ``spin freezing transition'' accompanying charge ordering which occurs at temperatures $\sim 250K$. Our results enable direct quantitative measurements of the spin relaxation rate, and yield information on spin dynamics in these materials and the related compounds $SrCuO_{2}$ and $Sr_{2}CuO_{3}$.
dc.description4 pages, 5 figures included in ps format
dc.identifierhttps://arxiv.org/abs/cond-mat/9903198
dc.identifierhttp://arxiv.org/abs/cond-mat/9903198
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/29135
dc.subjectStrongly Correlated Electrons
dc.titleObservation of spin freezing and relaxation at microwave frequencies in the spin ladder compound $Sr_{14-x}Ca_{x}Cu_{24}O_{41}$
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