Browse > Article
http://dx.doi.org/10.6564/JKMRS.2013.17.1.019

Molecular Dynamics in Paraelectric Phase of KH2PO4 Crystals Studied by Single Crystal NMR and MAS NMR  

Paik, Younkee (Daegu Center, Korea Basic Science Institute)
Chang, Celesta L. (Department of Physics, Yonsei University)
Publication Information
Journal of the Korean Magnetic Resonance Society / v.17, no.1, 2013 , pp. 19-23 More about this Journal
Abstract
The temperature dependences of the NMR spectrum and the spin-lattice relaxation times in $KH_2PO_4$ were investigated via single-crystal NMR and MAS NMR. The stretched-exponential relaxation that occurred because of the distribution of correlation times was indicative of the degree of the distribution of the double-well potential on the hydrogen bond. The behaviors responsible for the strong temperature dependences of the $^1H$ and $^{31}P$ spin-lattice relaxation times in the rotating frame $T_{1{\rho}}$ in $KH_2PO_4$ are likely related to the reorientational motion of the hydrogen-bond geometry and the $PO_4$ tetrahedral distortion.
Keywords
NMR; CP/MAS NMR; Crystal growth; Phase transition; Ferroelctrics;
Citations & Related Records
연도 인용수 순위
  • Reference
1 M. Badrouj, R. Malekfar, J. Raman Spectroscopy 38, 1089. (2007).   DOI   ScienceOn
2 I. V. Shnaidshtein, B. A. Strukov, Phys. Solid State 48, 2142. (2006).   DOI
3 E. V. Colla, A. V. Fokin, Y. A. Kumzerov, Solid State Commun. 103, 127. (1997).   DOI   ScienceOn
4 J. C. Slater, J. Chem. Phys. 9, 16. (1941).   DOI
5 R. Blinc, J. Pirs, J. Chem. Phys. 54, 1535. (1971).   DOI
6 J. Grunberg, S. Levin, I. Pelah, D. Gerlich, Phys. Status Solid B 49, 857. (1972).   DOI
7 C. E. Botez, D. Carbajal, V. A. K. Adiraju, J. Tackett, R. R. Chianelli, J. Phys. Chem. Solids 71, 1576. (2010).   DOI   ScienceOn
8 K. S. Lee, J. Phys. Chem. Solids 57, 333. (1996).   DOI   ScienceOn
9 E. Ortiz, A. Vargas, B. E. Mellander, Phys. Chem. Solids 59, 333. (1998).
10 J. Selger, V. Zagar, R. Blinc, V. H. Schmidt, J. Chem. Phys. 88, 3260. (1988).   DOI
11 R. K. Harris, Nuclear Magnetic Resonance Spectroscopy, Pitman Pub. INC, London, 1983.
12 M. S. Webb, D. Eimerl, S. P. Velsko, J. Opt. Soc. Am. B 9, 1118. (1992).   DOI