Volume 47, Number 3, August I 1999
|Page(s)||378 - 383|
|Section||Condensed matter: electronic structure, electrical, magnetic and optical properties|
|Published online||01 September 2002|
Magnetic phase transitions in Invar compound studied by high-pressure X-ray magnetic circular dichroism and X-ray diffraction
LURE, Bât 209D, Centre Universitaire Paris Sud - 91405 Orsay Cedex, France
2 Physique des Milieux Condensés, Université Paris VI - BP 77, 75252 Paris 05, France
3 Laboratoire de Magnétisme Louis Néel, CNRS BP 166 38042 Grenoble Cedex 9, France
4 IPCMS, 23 rue du Loess - 67037 Strasbourg Cedex, France
Accepted: 2 March 1999
X-ray magnetic circular dichroism (XMCD) measurements have been performed under high pressure and used to study the disordered 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.
PACS: 78.20.Ls – Magnetooptical effects / 62.50.+p – High-pressure and shock-wave effects in solids and liquids / 81.30.Bx – Phase diagrams of metals and alloys
© EDP Sciences, 1999
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.