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Home All issues Volume 49/ 6 Article
Issue Europhys. Lett.
Volume 49, Number 6, March 2000
Page(s) 807 - 813
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
DOI http://dx.doi.org/10.1209/epl/i2000-00223-5

DOI: 10.1209/epl/i2000-00223-5

Europhys. Lett., 49 (6), p. 807 (2000)

Evidence for a high-spin Fe phase in
${\rm Fe/Pd}(001)$ multilayers

V. Cros 1 - F. Petroff 1 - J. Vogel 2 - A. Fontaine 2 -
J. L. Menéndez 3 - A. Cebollada 3 - W. Grange 4 - J. P. Kappler 4 -
M. Finazzi 5 - N. Brookes 5

1 Unité Mixte de Recherche CNRS/Thomson-LCR, Domaine de Corbeville
91404 Orsay Cedex, France
2 Laboratoire de magnétisme Louis Néel, CNRS, B.P. 166 - 38042 Grenoble, France
3 Instituto de Microelectrónica de Madrid, CSIC
Isaac Newton 8, Parque Tecnológico, 28760 Tres Cantos, Spain
4 IPCMS-GEMME - 23 rue de Loess, 67037 Strasbourg, France
5 European Synchrotron Radiation Facility (ESRF)
BP 220, 38043 Grenoble Cedex, France

(Received 15 April 1999; accepted in final form 10 January 2000)

PACS :
75.70.Cn - Interfacial magnetic properties (multilayers, magnetic quantum wells, superlattices, magnetic heterostructures)
78.20.Ls - Magnetooptical effects

Abstract:

We have investigated by X-ray Magnetic Circular Dichroism (XMCD) the Fe spin and orbital magnetic moments in Fe/Pd(001) multilayers with nominal Fe thicknesses up to 3 Atomic Layers (AL). We find a strong enhancement of both spin and orbital moments ( $m_{spin} \approx 2.8\;\mu_{B}$ and $m_{orb} \approx 0.3\;\mu_{B}$) compared to bulk Fe in excellent agreement with theoretical calculations. For 1 AL of Fe, the magnetic dipole term was deduced using the Stöhr and König method and found to be non-negligible (20% of mspin). We further show that, for 3 AL of Fe, the high spin phase is correlated to a fcc-like crystalline structure with a large atomic volume of $Fe\ (\approx 12.4\;{\mbox{\AA}}^3)$.

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