Paramagnetic resonance of Mn2+ in KNO3 single crystal: Motional effects

  • K. N. Shrivastava
  • Putcha Venkateswarlu


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.


Electron Paramagnetic Resonance Line Width Dispersion Curve Aragonite Line Intensity 
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Copyright information

© Indian Academy of Sciences 1966

Authors and Affiliations

  • K. N. Shrivastava
    • 1
  • Putcha Venkateswarlu
    • 1
  1. 1.Department of PhysicsIndian Institute of TechnologyKanpurIndia

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