Phys. Rev. Lett. Phys. Rev. A Phys. Rev. B Phys. Rev. C Phys. Rev. D Phys. Rev. E Phys. Rev. ST AB Rev. Mod. Phys. Phys. Rev. (Series I) Phys. Rev. Volume: Page/Article:

Phys. Rev. B 55, 389–396 (1997)

[Issue 1 – 1 January 1997 ]

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Magnetic interface formation at Cr/Fe(100) and Fe/Cr/Fe(100): Magnetic dichroism in photoemission study

Giancarlo Panaccione and Fausto Sirotti

Laboratoire pour l'Utilisation du Rayonnement Electromagnetique, CNRS-CEA-MESR, F-91405 Orsay, France

Elisabetta Narducci

Instituto Nazionale di Fisica della Materia, Dipartimento di Fisica, Universit-gravea di Genova, I-16146 Genova, Italy

Giorgio Rossi

Laboratorium füautr Festköautrperphysik, Eidgenöautssische Technische Hochschule–Züautrich, CH-8093 Züautrich, Switzerland

and Instituto Nazionale di Fisica della Materia, Dipartimento di Fisica, Universit-gravea di Modena, I-41110 Modena, Italy

The early stages of the growth of Cr/Fe(100) and Fe/Cr/Fe(100) interfaces have been investigated by magnetic dichroism in photoemission of Fe 3p and Cr 3p core levels as measured from chiral experiments employing linearly polarized synchrotron radiation. Evidence is obtained for a 30% larger magnetic moment of interface Cr atoms with respect to Cr atoms belonging to epitaxial ultrathin films and a 40% magnetic moment enhancement of top Fe interface atoms in the Fe/Cr/Fe(100) trilayer. The kinetic growth conditions (450 K) lead to a uniform overlayer growth, without intermixing, but dominated by islanding. As a consequence the formation of a single-surface ferromagnetic domain for Fe/Cr/Fe(100) is frustrated up to two Fe monolayer (ML) thickness. The line shape of Fe 3p photoemission in the frustrated regime is consistent with the presence of in-plane magnetic order at 90° with respect to the substrate magnetization direction. The appearance of photoemission magnetic dichroism for Fe overlayer thicknesses exceeding 2 ML is interpreted as due to domain rotation towards the direction antiparallel to the Fe substrate magnetization.

©1997 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v55/p389
DOI: 10.1103/PhysRevB.55.389
PACS: 75.30.Pd, 75.25.+z, 71.70.Ej, 79.60.-i

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