Magnetic structures of the M {sub 2}TbF{sub 6} (M=Li, K, Rb) fluorides: A complex behavior resulting from frustration
- Laboratoire des Materiaux Inorganiques, UMR 6002 CNRS, Universite Blaise Pascal, 63177 Aubiere (France)
- Laboratoire Leon Brillouin, CEA-CNRS, CEA-Saclay, 91191 Gif-sur-Yvette (France)
Neutron powder diffraction has been performed on Li{sub 2}TbF{sub 6}, K{sub 2}TbF{sub 6} and Rb{sub 2}TbF{sub 6} fluoroterbates. Incommensurate long-range magnetic order is observed below T {sub N}=2.02, 1.60 and 2.07 K. The square-modulating of the magnetic structures can be correlated with the geometric frustration induced by the pseudo-hexagonal packing of the [TbF{sub 6}]{sup 2-} chains in these hexafluorides. This frustration and the magnetic interactions are discussed on the basis of experimental data and topological considerations. The magnetic structures encountered in this series, and the particular thermal evolution of the Li{sub 2}TbF{sub 6} magnetic structure may result from the competition between the magnetic interactions taking place in the chains and the magnetic interactions coupling the chains. - Graphical abstract: Pseudo-hexagonal packing of the [TbF{sub 6}]{sup 2-} chains in Li{sub 2}TbF{sub 6}.
- OSTI ID:
- 21015818
- Journal Information:
- Journal of Solid State Chemistry, Vol. 180, Issue 5; Other Information: DOI: 10.1016/j.jssc.2007.02.011; PII: S0022-4596(07)00085-0; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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