Magnetic instabilities in Fe3C cementite particles observed with FeK-edge X-ray circular dichroism under pressure -: art. no. 075502

被引：65

作者：

Duman, E

Acet, M ^{[1
]}

Wassermann, EF

Itié, JP

Baudelet, F

Mathon, O

Pascarelli, S

机构：

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

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

[3] Syncrotron Soleil Orme Merisiers, F-91192 Gif Sur Yvette, France

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

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.94.075502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ferromagnetic interstitial iron compound Fe3C (cementite) is expected to have Invar properties, whereby a high-moment to low-moment transition should occur when the atomic volume is reduced below a critical value. We, therefore, examine the pressure dependence of the Fe K-edge x-ray magnetic circular dichroism in Fe3C at ambient temperature and pressures up to 20 GPa. We find clear evidence for a high-moment to low-moment transition around 10 GPa.

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