A nuclear magnetic resonance study of the structural properties and molecular motions of Li₂KH(SO₄)₂ and LiKSO₄ single crystals

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• 作者：Ae Ran Lim ; ^{aeranlim@hanmail.net} ; ^{arlim@jj.ac.kr}
• 关键词：Li2KH(SO4)2 ; LiKSO4 ; Ferroelectrics ; Crystal growth ; Nuclear magnetic resonance ; Phase transition
• 刊名：Physica B
• 出版年：2012
• 出版时间：1 March 2012
• 年：2012
• 卷：407
• 期：5
• 页码：833-837
• 全文大小：675 K

文摘

The structural properties and relaxation mechanisms of Li₂KH(SO₄)₂ crystals were determined using the temperature dependences of NMR spectra and the spin-lattice relaxation times (T₁) of their ¹H, ⁷Li, and ³⁹K nuclei. The results obtained were compared with the previously reported physical properties of LiKSO₄ crystals. The substitution of the potassium ions with protons in the LiKSO₄ crystals were variations in the phase transition temperatures, and the non-appearance of ferroelastic properties. The ⁷Li T₁ for the Li₂KH(SO₄)₂ crystals was much shorter than the ⁷Li T₁ for the LiKSO₄ crystals, and these findings indicate that the presence of the protons in Li₂KH(SO₄)₂ causes the Li ions to move with greater freedom.