The linear chain antiferromagnetism previously reported for Ba2MnS3 and Ba2MnSe3 is now demonstrated for Ba2MnTe3. The mixed-chalcogenide solid solutions Ba2MnXxX′3-x (X, X′ = S, Se, Te; x = 0, 1, 2) have been prepared and their electrical and magnetic properties studied. All of the phases are insulating with room temperature resistivities of approximately 102-103 Ω cm. The magnetic susceptibility curves of these mixed-chalcogenide phases exhibit broad maxima typical of one dimensional magnetic ordering. The linear-chain model of Bonner-Fisher for Heisenberg-type ions was applied to the susceptibility data. The geometry of the superexchange pathway appears to be critical in determining the strength of the magnetic coupling, with the polarizability of the bridging atom having little effect.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry