LATTICE SOFTENING IN NANOMETER-SIZE IRON PARTICLES

被引：57

作者：

CHILDRESS, JR ^{[1
]}

CHIEN, CL ^{[1
]}

ZHOU, MY ^{[1
]}

SHENG, P ^{[1
]}

机构：

[1] EXXON RES & ENGN CO,ANNANDALE,NJ 08801

来源：

PHYSICAL REVIEW B | 1991年 / 44卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.44.11689

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The thermal properties of nanometer-size bcc iron particles imbedded in amorphous Al2O3 and SiO2 matrices have been investigated by Mossbauer spectroscopy. Contributions from both core and surface Fe atoms are observed in the Mossbauer spectrum. The Debye temperature in the core is seen to decrease dramatically: by more than 30% for particles smaller than 2 nm. This is good agreement with a recent self-consistent Einstein-model calculation on the dynamics of small Fe particles. Differences in results regarding the lattice spacing, however, suggest a possible role of the matrix in limiting lattice relaxation.

引用

页码：11689 / 11696

页数：8

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