Title: Cationic substitutions in fluorides of hexagonal perovskite type. III. The CsNi1?xCdxF3 system: Crystal chemistry and trimeric magnetic interactions in CsNi34Cd14F3★★Parts I and II: Mat. Res. Bull. 14 (1979) p. 37 and p. 869.
Journal Title: Materials Letters
Publication Date: September 1982
Start Page: 49
End Page: 52
Published online: 6 May 2003
Author: Jean-Michel Dance
Affiliations: Laboratoire de Chimie du Solide du CNRS, Université de Bordeaux I, 351, cours de la Libération, 33405 Talence Cedex, France
Abstract: sNi1?xCdxF3 system a domain of 12R-structure is obtained for 0.25 ? x ? 0.50. Neutron diffraction experiments have been performed on the composition CsNi0.75Cd0.25F3, i.e. Cs4Ni3CdF12. An ordering has been detected between Ni2+ and Cd2+. The Ni2+ cations are located in octahedra sharing faces and forming linear trimers of composition Ni3F12. No magnetic order has been found down to 4.2 K. Magnetic measurements characterize ferromagnetic couplings within the trimers. Good agreement is obtained between experimental data and χ values calculated using a HDvV hamiltonian and an exchange constant Jk = +9 K between adjacent Ni2+ ions.