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Nuclear Magnetic Resonance Study of 23Na Nucleus in NaBrO3 Single Crystal
The nuclear magnetic resonance of the 23Na nucleus in a NaBrO3 single crystal was investigated at the
temperature range of 200 K~410 K. The tendencies of temperature dependence of the nuclear quadrupole
coupling for the two magnetically inequivalent Na(I) and Na(II) centers are found to be opposite to each other. The nuclear spin-lattice relaxation mechanism of 23Na in the NaBrO3 crystal is investigated, and the result revealed that the Raman process is dominant in the temperature range investigated. The relaxation process of the 23Na nuclear spins was well described by a single exponential function in time. The T1 values of the 23Na nuclei in the NaBrO3 single crystal decreased with increasing temperature. The calculated activation energy for the 23Na is 0.032 ± 0.002 eV.