TEMPERATURE-VARIATION OF ASYMMETRY IN POTENTIAL BARRIERS IN PYRIDINIUM NITRATE

被引：26

作者：

KOZAK, A ^{[1
]}

GROTTEL, M ^{[1
]}

WASICKI, J ^{[1
]}

PAJAK, Z ^{[1
]}

机构：

[1] ACAD AGR POZNAN,DEPT PHYS,PL-60637 POZNAN,POLAND

来源：

PHYSICA STATUS SOLIDI A-APPLIED RESEARCH | 1994年 / 143卷 / 01期

关键词：

D O I：

10.1002/pssa.2211430108

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The proton NMR second moment and the spin lattice relaxation time are studied for polycrystalline pyridinium nitrate over a wide range of temperature. The cation reorientation is described by a model of three-well potential with two activation energies. The asymmetry parameter DELTA is found to decrease linearly with increasing temperature. The symmetrization of the barriers seems to trigger the solid liquid phase transition.

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页码：65 / 70

页数：6

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