MagneticSusceptibility and SpinExchangeInteractions of the HexagonalPerovskite-TypeOxides Sr4/3(Mn2/3Ni1/3)O3
Langue
en
Article de revue
Ce document a été publié dans
Journal of Solid State Chemistry. 2002, vol. 163, n° 2, p. 513-518
Elsevier
Résumé en anglais
Magneticsusceptibility measurements were carried out for two hexagonalperovskite-typeoxides Sr1+x(Mn1−xNix)O3 with slightly different compositions (i.e., x=1-3 and and 0.324). A significant difference in the susceptibilities ...Lire la suite >
Magneticsusceptibility measurements were carried out for two hexagonalperovskite-typeoxides Sr1+x(Mn1−xNix)O3 with slightly different compositions (i.e., x=1-3 and and 0.324). A significant difference in the susceptibilities of the two phases demonstrates the need to control phase compositions accurately. Sr4/3(Mn2/3Ni1/3)O3 consists of two spin sublattices, i.e., the Mn4+ and the Ni2+ ion sublattices. Spin dimer analysis was carried out to examine the relative strengths in the spinexchangeinteractions of the Mn4+ ion sublattice. The temperature dependence of the magneticsusceptibility of Sr4/3(Mn2/3Ni1/3)O3 was found consistent with a picture in which the Mn4+ ion sublattice has weakly interacting antiferromagnetically coupled (Mn4+)2 dimers, the Ni2+ ion sublattice acts as a paramagnetic system, and the two sublattices are nearly independent.< Réduire
Mots clés en anglais
Magnetic susceptibility
Oxides
Perovskites
Spin
Solid solution
Origine
Importé de halUnités de recherche