Dielectric and NMR studies of nanoporous matrices loaded with sodium nitrite

被引：39

作者：

Baryshnikov, S. V. ^{[1
]}

Stukova, E. V.

Charnaya, E. V.

Tien, C.

Lee, M. K.

Boehlmann, W.

Michel, D.

机构：

[1] Blagoveshchensk State Pedag Univ, Blagoveshchensk 675002, Russia

[2] Natl Cheng Kung Univ, Dept Phys, Tainan 71001, Taiwan

[3] St Petersburg State Univ, Fock Inst Phys, St Petersburg 198504, Russia

[4] Univ Leipzig, Fac Phys & Geosci, D-04103 Leipzig, Germany

来源：

PHYSICS OF THE SOLID STATE | 2006年 / 48卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/S1063783406030292

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

NMR and dielectric studies have been performed on NaNO2 loaded in mesoporous matrices of CM-41 and SBA-15 with pore sizes of 20, 37, and 52 (A) over circle. The spin-lattice relaxation rate and Na-23 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.

引用

页码：593 / 599

页数：7

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