Vibrational properties of nanograins and interfaces in nanocrystalline materials

被引：40

作者：

Stankov, S. ^{[1
]}

Yue, Y. Z. ^{[2
,3
]}

Miglierini, M. ^{[4
]}

Sepiol, B. ^{[5
]}

Sergueev, I. ^{[1
]}

Chumakov, A. I. ^{[1
]}

Hu, L. ^{[2
,3
]}

Svec, P. ^{[6
]}

Rueffer, R. ^{[1
]}

机构：

[1] European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France

[2] Aalborg Univ, Sect Chem, DK-9000 Aalborg, Denmark

[3] Shandong Univ, Key Lab Liquid Struct & Hered Mat, Jinan 250061, Peoples R China

[4] Slovak Tech Univ, Dept Nucl Phys & Technol, Bratislava 81219, Slovakia

[5] Univ Vienna, Fac Phys, A-1090 Vienna, Austria

[6] Slovak Acad Sci, Inst Phys, Bratislava 84511, Slovakia

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.100.235503

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The vibrational dynamics of nanocrystalline Fe90Zr7B3 was studied at various phases of crystallization. The density of phonon states (DOS) of the nanograins was separated from that of the interfaces for a wide range of grain sizes and interface thicknesses. The DOS of the nanograins does not vary with their size and down to 2 nm grains still closely resembles that of the bulk. The anomalous enhancement of the phonon states at low and high energies originates from the DOS of the interfaces and scales linearly to their atomic fraction.

引用

页数：4

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