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Oscillatory interlayer coupling mediated by fcc-Fe/Co(1 0 0) films

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Applied Surface Science

Volume 182, Issues 3-4
22 October 2001
Pages 302-307

DOI: 10.1016/S0169-4332(01)00418-4
PII: S0169-4332(01)00418-4
Copyright © 2001 Elsevier Science B.V. All rights reserved.

K. Maiti ^,^a, A. Dallmeyer^a, M. C. Malagoli^a, C. Carbone^a^,^f, W. Eberhardt^a, O. Rader^b, L. Pasquali^c, A. Banerjee^d, S. Turchini^e, S. Zennaro^f and N. Zema^f

^a Institut für Festkörperforschung, Forschungszentrum Jülich, D-52425 Jülich, Germany
^b BESSY, Albert-Einstein-Straße 15, D-12489 Berlin, Germany
^c INFM and Dipartimento di Fisica, Università di Modena e Reggio Emilia, Via Campi 213/a, I-41100 Modena, Italy
^d Inter University Consortium for DAE Facilities, University Campus, Khandwa Road, Indore 452017, India
^e Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Materiali, Via Salaria Km. 29,300, 00016 Roma, Italy
^f Consiglio Nazionale delle Ricerche, Istituto di Struttura della Materia, via del Fosso del Cavaliere 100, 00133 Roma, Italy

Available online 3 January 2002.

The magnetism of epitaxial fcc-Fe films deposited on Co(1 0 0) and sandwiched between two Co(1 0 0) films was investigated by X-ray magnetic circular dichroism at various temperatures. The dependence of the Fe magnetism on the film thickness is complex and qualitatively similar on Co(1 0 0) and in fcc-Co/Fe/Co(1 0 0) trilayers. The fcc-Fe film magnetization presents a pronounced oscillation suggesting a partial antiferromagnetic ordering in the 5_¯10 monolayers (ML) thickness range. The decrease in temperature down to 100 K does not exhibit any change in the magnetic properties of the Fe-film. The fcc-Fe films mediate an oscillatory, indirect coupling in Co/Fe/Co(1 0 0) structures that alternates in correspondence with the changes of the Fe magnetization.

Author Keywords: Magnetism; Oscillatory interlayer coupling; Fcc-Fe films

1. Introduction
2. Experimental
3. Results and discussions
4. Conclusions
Acknowledgements
References

(10K)
Fig. 1. Fe and Co x-ray absorption spectra for parallel (R) and antiparallel (L) alignment of light polarization and magnetization direction and the corresponding dichroism spectra (R_¯L) determined for 3.1 and 5.3 ML Fe on 8 ML Co(1 0 0).

(9K)
Fig. 2. (a) Fe and Co dichroic signals (open squares and solid circles, respectively) determined for the Fe/Co(1 0 0) system as a function of Fe film thickness; (b) Fe and Co dichroic signals (open squares and solid circles, respectively) determined for the trilayer 2 ML Co/Fe/8 ML Co(1 0 0) system as a function of Fe film thickness in comparison with the results of the Fe/8 ML Co(1 0 0) system (dashed lines).

(11K)
Fig. 3. (a) Co dichroic signals determined for an uncovered Fe film on 20 ML Co (open squares) and for the same sample covered with 4 ML Co (solid circles) and 8 ML Co (open diamonds); (b) Fe dichroic signals for the same systems as shown in part (a); (c) Fe dichroic signal at 100 K.

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Corresponding author. Present address: Department of Condensed Matter Physics and Materials Science, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005, India

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Applied Surface Science
Volume 182, Issues 3-4
22 October 2001
Pages 302-307

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