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Magnetic interface polarization of the La-5d states in Fe/LaHx multilayers |
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| Authors: | M Münzenberg T Neisius F Leuenberger W Felsch S Pizzini A Fontaine G Krill S Pascarelli |
| Institution: | Physikalisches Institut and SFB 345, Bunsenstr. 9, 37073 G?ttingen, Germany, DE ESRF, BP 220, 38043 Grenoble Cedex, France, FR Laboratoire Louis Néel, CNRS, BP 166, 38042 Grenoble Cedex, France, FR LURE, Université Paris-Sud, 91405 Orsay, France, FR |
| Abstract: | For rare-earth (RE)-hydrides (REHx), a metal-to-insulator transition is observed if the hydrogen concentration is increased from the dihydride (x=2) towards the trihydride (x=3). This transition provides an object for studies of the magnetic interface polarization in layered ferromagnet/insulator structures. For different samples with a fixed Fe and varied LaHx sublayer thickness tLaHx (15 ? Fe/t? LaHx]xn), the H concentration x in the LaHx sublayer is gradually increased in the experiment. Starting from the as prepared dihydride REH2-δ, the modification of the magnetic polarization of the La-5d states at the Fe/Lax interface is studied across the transition by magnetic circular dichroism measurements at the La-L2 and L3 edges. The experiments reveal an induced magnetic polarization of the La-5d hole states on a length scale of 9 ? that is independent of the altered electronic structure of the La-5d states. Received: 23 May 2001 / Accepted: 4 July 2001 / Published online: 5 October 2001 |
| Keywords: | PACS: 71 30 +h 75 70 -i 87 64 Ni |
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