An NMR study of internal motions and phase transitions in NiTiF<sub>6</sub>.6H<sub>2</sub>O
Hsueh Mei Cheung; R L Lichti; Hsueh Mei Cheung; Dept. of Phys. & Eng. Phys., Texas Tech. Univ., Lubbock, TX, USA; R L Lichti; Dept. of Phys. & Eng. Phys., Texas Tech. Univ., Lubbock, TX, USA
Журнал:
Journal of Physics C: Solid State Physics
Дата:
1985-11-30
Аннотация:
The NMR linewidths of hydrogen and fluorine in the complex ionic salt NiTiF<sub>6</sub>.6H<sub>2</sub>O have been examined from 77 to 400K. Separate abrupt changes in the <sup>1</sup>H width (122-126K) and the <sup>19</sup>F width (131-134K) confirm the existence of two transitions in the known structural transformation region, and an anomaly near 205K suggests a possible additional transition. The overall temperature dependence is discussed in terms of reorientations of the octahedral complex ions.
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