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- Title
Long-Range Magnetic Order in Quasi-One-Dimensional NaCrSi[sub 2]O[sub 6] and NaCrGe[sub 2]O[sub 6] Metal Oxides.
- Authors
Vasil'ev, A.N.; Ignatchik, O.L.; Sokolov, A.N.; Hiroi, Z.; Isobe, M.; Ueda, Y.
- Abstract
Formation of a long-range magnetic order is observed at low temperatures in NaCrSi[sub 2]O[sub 6] and NaCrGe[sub 2]O[sub 6] quasi-one-dimensional metal oxide compounds with a pyroxene structure. The first of these compounds, NaCrSi[sub 2]O[sub 6], is an antiferromagnet with the Néel temperature T[sub N] = 3 K, while the second, NaCrGe[sub 2]O[sub 6], is a ferromagnet with the Curie temperature T[sub C] = 6 K. From the measurements of magnetization and specific heat of these compounds, the main parameters of their magnetic subsystems are determined. In NaCrSi[sub 2]O[sub 6], 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 CrO[sub 6] octahedra. © 2003 MAIK “Nauka / Interperiodica”.
- Subjects
METALLIC oxides; MAGNETICS; FERROMAGNETIC materials; ANTIFERROMAGNETISM; SPECIFIC heat; MAGNETIZATION
- Publication
JETP Letters, 2003, Vol 78, Issue 9, p551
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/1.1641482