Evidence for a high-spin Fe phase in multilayers

V. Cros; F. Petroff; J. Vogel; A. Fontaine; J. L. Menéndez; A. Cebollada; W. Grange; J. P. Kappler; M. Finazzi; N. Brookes

doi:10.1209/epl/i2000-00223-5

All issues

Volume 49 / No 6 (March 2000)

Europhys. Lett., 49 6 (2000) 807-813

Abstract

Issue		Europhys. Lett. Volume 49, Number 6, March 2000


Page(s)		807 - 813
Section		Condensed matter: electronic structure, electrical, magnetic, and optical properties
DOI		https://doi.org/10.1209/epl/i2000-00223-5
Published online		01 September 2002

Europhys. Lett., 49 (6), pp. 807-813 (2000)

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

V. Cros¹, F. Petroff¹, J. Vogel², A. Fontaine², J. L. Menéndez³, A. Cebollada³, W. Grange⁴, J. P. Kappler⁴, M. Finazzi⁵ and N. Brookes⁵

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: 10 January 2000

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 ( $m_{\ab{spin}} \approx 2.8\;\mu_{\ab B}$ and $m_{\ab{orb}} \approx 0.3\;\mu_{\ab B}$ ) 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 $m_{\ab{spin}}$ ). 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 $\ab{Fe}\ (\approx 12.4\;\tx{\AA}^3)$ .

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

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