Dielectric and NMR studies of nanoporous matrices loaded with sodium nitrite

S. V. Baryshnikov, E. V. Stukova, E. V. Charnaya, C. Tien, M. K. Lee, W. Böhlmann, D. Michel

研究成果: Article同行評審

29 引文 斯高帕斯(Scopus)

摘要

NMR and dielectric studies have been performed on NaNO2 loaded in mesoporous matrices of MCM-41 and SBA-15 with pore sizes of 20, 37, and 52 Å. The spin-lattice relaxation rate and 23Na NMR line shape, as well as the complex impedance, were measured within a broad temperature interval including the ferroelectric phase transition in bulk NaNO2. Two different phases of sodium nitrite, the crystalline and melt phases, are shown to coexist under conditions of a restricted geometry. The crystalline phase undergoes a ferroelectric phase transition. The melt fraction increases with temperature. The existence of two phases accounts for all experimental data on NaNO2 under conditions of a restricted geometry.

原文English
頁(從 - 到)593-599
頁數7
期刊Physics of the Solid State
48
發行號3
DOIs
出版狀態Published - 2006 三月

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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