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This article is cited in 7 scientific papers (total in 7 papers)
CONDENSED MATTER
Ñomplex magnetic differentiation of cobalts in
Na$_{x}$CoO$_{2}$ with 22 K Neel temperature
I. R. Mukhamedshinab, I. F. Gilmutdinova, M. A. Salosina, H. Alloulb a Institute of Physics, Kazan (Volga region) Federal University
b Paris-Sud University 11
Abstract:
Single crystals of sodium cobaltates Na$_{x}$CoO$_{2}$
with $x \approx 0.8$ were grown by the floating zone technique. Using electrochemical
Na de-intercalation method we reduced the sodium content in the as-grown
crystals down to pure phase with $22$ K Néel temperature and
$x \approx 0.77$. The $^{59}$Co NMR study
in the paramagnetic state of the $T_{\text{N}}=22$ K
phase permitted us to evidence that at least 6 Co sites are differentiated.
They could be separated by their magnetic behaviour into three types: a
single site with cobalt close to non-magnetic Co$^{3+}$, two sites with the
most magnetic cobalts in the system, and the remaining three sites displaying
an intermediate behaviour. This unusual magnetic differentiation calls for
more detailed NMR experiments on our well characterized samples.
Received: 19.03.2014
Citation:
I. R. Mukhamedshin, I. F. Gilmutdinov, M. A. Salosin, H. Alloul, “Ñomplex magnetic differentiation of cobalts in
Na$_{x}$CoO$_{2}$ with 22 K Neel temperature”, Pis'ma v Zh. Èksper. Teoret. Fiz., 99:8 (2014), 542–546; JETP Letters, 99:8 (2014), 471–475
Linking options:
https://www.mathnet.ru/eng/jetpl3719 https://www.mathnet.ru/eng/jetpl/v99/i8/p542
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