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Nuclear Magnetic Resonance Study of 23Na Nucleus in NaBrO3 Single Crystal

Journal of Magnetics, Volume 20, Number 4, 31 Dec 2015, Pages 342-346

Tae Ho Yeom *

(Department of Laser and Optical Information Engineering, Cheongju University)

Abstract

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.

Keywords: magnetic resonance; NaBrO3 crystal; relaxation mechanism; activation energy

DOI: http://dx.doi.org/10.4283/JMAG.2015.20.4.342

Full Text: PDF

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