Applied Magnetic Resonance

, Volume 35, Issue 3, pp 449-458

First online:

1H and 19F NMR relaxation time studies in (NH4)2ZrF6 superionic conductor

  • K. J. MallikarjunaiahAffiliated withDepartment of Physics, Bangalore University
  • , K. P. RameshAffiliated withDepartment of Physics, Indian Institute of Science
  • , Ramakrishna DamleAffiliated withDepartment of Physics, Bangalore UniversityDepartment of Physics, Bangalore University Email author 

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1H and 19F spin-lattice relaxation times in polycrystalline diammonium hexafluorozirconate have been measured in the temperature range of 10–400 K to elucidate the molecular motion of both cation and anion. Interesting features such as translational diffusion at higher temperatures, molecular reorientational motion of both cation and anion groups at intermediate temperatures and quantum rotational tunneling of the ammonium group at lower temperatures have been observed. Nuclear magnetic resonance (NMR) relaxation time results correlate well with the NMR second moment and conductivity studies reported earlier.