Mössbauer study of Na$_{0.82}$CoO$_2$ (doped by 1% $^{57}$Fe)

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dc.creatorPissas, M.
dc.creatorPsycharis, V.
dc.creatorStamopoulos, D.
dc.creatorPapavassiliou, G.
dc.creatorSanakis, Y.
dc.creatorSimopoulos, A.
dc.date2005-03-29
dc.date.accessioned2026-07-07T03:04:20Z
dc.date.available2026-07-07T03:04:20Z
dc.descriptionWe studied by Mössbauer spectroscopy the Na$_{0.82}$CoO$_2$ compound using 1% $^{57}$Fe as a local probe which substitutes for the Co ions. Mössbauer spectra at T=300 K revealed two sites which correspond to Fe$^{3+}$ and Fe$^{4+}$. The existence of two distinct values of the quadrupole splitting instead of a continuous distribution should be related with the charge ordering of Co$^{+3}$, Co$^{+4}$ ions and ion ordering of Na(1) and Na(2). Below T=10 K part of the spectrum area, corresponding to Fe$^{4+}$ and all of Fe$^{3+}$, displays broad magnetically split spectra arising either from short-range magnetic correlations or from slow electronic spin relaxation.
dc.identifierhttps://arxiv.org/abs/cond-mat/0503662
dc.identifierhttp://arxiv.org/abs/cond-mat/0503662
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/26097
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleMössbauer study of Na$_{0.82}$CoO$_2$ (doped by 1% $^{57}$Fe)
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