Density of phonon states in iron at high pressure

被引：107

作者：

Lübbers, R

Grünsteudel, HF

Chumakov, AI

Wortmann, G ^{[1
]}

机构：

[1] Univ Gesamthsch Paderborn, Fachbereich Phys, D-33095 Paderborn, Germany

[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

SCIENCE | 2000年 / 287卷 / 5456期

关键词：

D O I：

10.1126/science.287.5456.1250

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The lattice dynamics of the hexagonal close-packed (hcp) phase of iron was studied with nuclear inelastic absorption of synchrotron radiation at pressures from 20 to 42 gigapascals. A variety of thermodynamic parameters were derived from the measured density of phonon states for hcp iron. such as Debye temperatures, Gruneisen parameter, mean sound velocities, and the Lattice contribution to entropy and specific heat. The results are of geophysical interest, because hcp iron is considered to be a major component of Earth's inner core.

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页码：1250 / 1253

页数：4

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