Abstract
The magnetic susceptibilities of CsMnCl3·2H2O and CsMnCl3·2D2O have been measured at temperatures between 0.35 and 35 K. Above ∼9 K both salts show the broad susceptibility maximum of the one-dimensional Heisenberg antiferromagnet previously seen in the hydrate. In both cases the intrachain exchange parameter isJ/k=−3.00 K. AtT N (4.89 K for the hydrate) three-dimensional antiferromagnetic long-range order begins to develop due to weak interchain interactions with preferred alignment along theb axis. AtT N all susceptibility-temperature curves have their maximum slopes, those of χ a and χ c being negative. This is shown to be related to the unusual phase diagram of these systems. The limiting behavior of the susceptibilities asT → 0 K is established and interpreted. χ⊥(0) reflects the strong anisotropy of the spinwave spectrum due to the dominant intrachain interaction.
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Supported in part by the National Science Foundation and the Office of Naval Research.
Supported in part by the Science Research Fund of the Ministry of Education of the Japanese government.
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Kobayashi, H., Tsujikawa, I. & Friedberg, S.A. The magnetic susceptibilities of CsMnCl3·2H2O and CsMnCl3·2D2O. J Low Temp Phys 10, 621–633 (1973). https://doi.org/10.1007/BF00655456
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DOI: https://doi.org/10.1007/BF00655456