Abstract
The electron paramagnetic resonance of Mn2+ in KNO3 single crystal is investigated over a temperature cycle through transition temperatures. The hyperfine coupling constant, A, half width,Δ H, and the line intensity, I, are found to show sudden changes at the transition temperature, at whichα-KNO3 changes intoβ-KNO3. The lines are much sharper in the high temperatureβ-phase than inα-phase of the crystal. They are explained, qualitatively, in terms of structure change and rotation of NO −3 ions. The spectra in the two phases,α andβ, are analysed in terms of usual spin-Hamiltonian. A search of metastableγ-phase is also made and probable indications for the same are found.
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Shrivastava, K.N., Venkateswarlu, P. Paramagnetic resonance of Mn2+ in KNO3 single crystal: Motional effects. Proc. Indian Acad. Sci. 64, 275–282 (1966). https://doi.org/10.1007/BF03047544
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DOI: https://doi.org/10.1007/BF03047544