Studies on the Linear Chain Antiferromagnets: Ba2MnX3 (X = S, Se, Te) and Their Solid Solutions
✍ Scribed by M.A. Greaney; K.V. Ramanujachary; Z. Teweldemedhin; M. Greenblatt
- Publisher
- Elsevier Science
- Year
- 1993
- Tongue
- English
- Weight
- 318 KB
- Volume
- 107
- Category
- Article
- ISSN
- 0022-4596
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✦ Synopsis
The linear chain antiferromagnetism previously reported for (\mathrm{Ba}{2} \mathrm{MnS}{3}) and (\mathrm{Ba}{2} \mathrm{MnSe}{3}) is now demonstrated for (\mathrm{Ba}{2} \mathrm{MnTe}{3}). The mixed-chalcogenide solid solutions (\mathrm{Ba}{2} \mathrm{Mn}{x} X_{3_{-x}}^{\prime}\left(X, X^{\prime}=\mathrm{S}, \mathrm{Se}, \mathrm{Te}\right.); (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 (10^{2}-10^{3} \Omega \mathrm{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. 1993 Academic Press. Inc.