Pressure-induced invar effect in Fe-Ni alloys

被引：78

作者：

Dubrovinsky, L ^{[1
]}

Dubrovinskaia, N

Abrikosov, IA

Vennström, M

Westman, F

Carlson, S

van Schilfgaarde, M

Johansson, B

机构：

[1] Uppsala Univ, Dept Earth Sci, S-75236 Uppsala, Sweden

[2] Univ Uppsala, Dept Phys, Condensed Matter Theory Grp, S-75121 Uppsala, Sweden

[3] Univ Uppsala, Dept Inorgan Chem, S-75121 Uppsala, Sweden

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

[5] Sandia Natl Labs, Livermore, CA 94551 USA

[6] Royal Inst Technol, Dept Mat Sci & Engn, SE-10044 Stockholm, Sweden

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.86.4851

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the pressure-volume (P-V) relations for cubic iron-nickel alloys for three different compositions: Fe0.64Ni0.36, Fe0.55Ni0.45, and Fe0.20Ni0.80. It is observed that for a certain pressure range the bulk modulus does not change or can even decrease to some minimum value, after which it begins to increase under still higher pressure. In our experiment, we observe for the first time a new effect, namely, that the Fe-Ni alloys with high Ni concentrations, which show positive thermal expansion at ambient pressure, become Invar system upon compression over a certain pressure range.

引用

页码：4851 / 4854

页数：4

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