Large spontaneous magnetostrictive softening below the Curie temperature of Fe3C Invar particles

被引：27

作者：

Duman, E ^{[1
]}

Acet, M

Hülser, T

Wassermann, EF

Rellinghaus, B

Itié, JP

Munsch, P

机构：

[1] Univ Duisburg Essen, D-47048 Duisburg, Germany

[2] IFW Dresden, D-01171 Dresden, Germany

[3] Univ Paris 06, CNRS, UMR 7602, F-75252 Paris 05, France

[4] Ctr Univ Paris Sud, Lab Utilisat Rayonnement Electromagnet, F-91898 Orsay, France

来源：

JOURNAL OF APPLIED PHYSICS | 2004年 / 96卷 / 10期

关键词：

D O I：

10.1063/1.1803634

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Fe3C incorporates only Fe as a metallic element and is an Invar material with valence electron concentration 8.67. We have studied the equation of state up to 20 GPa of Fe3C particles (dsimilar to40 nm) below and above the Curie temperature (room temperature and 550 K, respectively) to search for a softening associated with a magnetovolume instabilities characteristic of Invar-type material. The isothermal bulk modulus of Fe3C particles at room temperature was found to be about 13% smaller than that of the value at 550 K. This difference is comparable with the relative difference in the bulk modulus of Fe65Ni35 Invar in a similar temperature range around the Curie temperature. (C) 2004 American Institute of Physics.

引用

页码：5668 / 5672

页数：5

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