Magnetic phase transitions in Fe72Pt28 Invar compound studied by high-pressure X-ray magnetic circular dichroism and X-ray diffraction

被引：25

作者：

Odin, S

Baudelet, F

Giorgetti, C

Dartyge, E

机构：

[1] Ctr Univ Paris Sud, LURE, F-91405 Orsay, France

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

[3] CNRS, Lab Magnet Louis Neel, F-38042 Grenoble 9, France

[4] IPCMS, F-67037 Strasbourg, France

来源：

EUROPHYSICS LETTERS | 1999年 / 47卷 / 03期

关键词：

D O I：

10.1209/epl/i1999-00399-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

X-ray magnetic circular dichroism (XMCD) measurements have been performed under high pressure and used to study the disordered Fe72Pt28 Invar alloy. The well-known high spin to low spin state transition is observed at 4 GPa. In addition, XMCD evidences a second transition to the nonmagnetic phase at high pressure in the disordered alloy This result is made unambiguous by comparison to the ordered alloy whose hysteresis cycle of the phase transitions is dramatically different from the disordered alloy The pressure-dependent collapse of the Curie temperature is the dominant mechanism for reducing the magnetization only in the ordered alloy.

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页码：378 / 383

页数：6

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