Abstract
Formation of a long-range magnetic order is observed at low temperatures in NaCrSi2O6 and NaCrGe2O6 quasi-one-dimensional metal oxide compounds with a pyroxene structure. The first of these compounds, NaCrSi2O6, is an antiferromagnet with the Néel temperature T N =3 K, while the second, NaCrGe2O6, is a ferromagnet with the Curie temperature T C =6 K. From the measurements of magnetization and specific heat of these compounds, the main parameters of their magnetic subsystems are determined. In NaCrSi2O6, a spin-flip transition is observed. A change in the type of magnetic order that accompanies the replacement of Si by Ge can be attributed to a change in the parameters of the competing direct antiferromagnetic Cr-Cr and indirect ferromagnetic Cr-O-Cr interactions in isolated chains of CrO6 octahedra.
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Translated from Pis’ma v Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 78, No. 9, 2003, pp. 1039–1042.
Original Russian Text Copyright © 2003 by Vasil’ev, Ignatchik, Sokolov, Hiroi, Isobe, Ueda.
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Vasil’ev, A.N., Ignatchik, O.L., Sokolov, A.N. et al. Long-range magnetic order in quasi-one-dimensional NaCrSi2O6 and NaCrGe2O6 metal oxides. Jetp Lett. 78, 551–554 (2003). https://doi.org/10.1134/1.1641482
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DOI: https://doi.org/10.1134/1.1641482