Vibrational density of states of nanocrystalline Ni3Fe

被引：40

作者：

Frase, HN ^{[1
]}

Nagel, LJ ^{[1
]}

Robertson, JL ^{[1
]}

Fultz, B ^{[1
]}

机构：

[1] OAK RIDGE NATL LAB,OAK RIDGE,TN 37831

来源：

PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES | 1997年 / 75卷 / 03期

关键词：

D O I：

10.1080/13642819708202322

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We measured inelastic neutron scattering spectra for two states of Ni3Fe: firstly as milled, when the material had a characteristic nanocrystallite size of 9 nm; secondly annealed, when the material had a characteristic crystallite size of 30 nm. The nanocrystalline material showed an enhancement by a factor of two in it density of states (DOS) at energies below 15 meV, and some broadening of its longitudinal peak at 33 meV The differences between the vibrational DOSs of the nanocrystalline and annealed materials provide a difference in vibrational entropy of 0.18k(B) atom(-1) at high temperatures.

引用

页码：335 / 347

页数：13

共 26 条

[1]

[Anonymous], 1989, ADV POWDER METALLURG

[2] INELASTIC SCATTERING OF NEUTRONS BY POLYCRYSTALS [J].