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Issue 62, 2016, Issue in Progress
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Stabilization of perpendicular magnetic anisotropy in CeO2 films deposited on Co/Pt multilayers

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Abstract

Materials with perpendicular magnetic anisotropy (PMA) are of great interest as they have potential applications in high-density non-volatile memories, spin logic devices, and other spintronics applications. To attain perpendicular anisotropy, a number of material systems have been explored as ferromagnetic electrodes. Here, we use (Co/Pt)-multilayered films with PMA covered by a gold spacer-layer to induce the perpendicular magnetization in a ferromagnetic layer of cerium oxide and to control the reversible switching of its magnetization. The origin of the room-temperature ferromagnetism observed in nanocrystalline cerium oxide films remains controversial, but their wide energy band-gap and their transparency to visible light attracts attention for possible applications in magneto-optical devices. A weak magnetic stray field of 40 Oe emanates from the (Co/Pt)-multilayered film and permeates the gold spacer layer. Using a simple micromagnetic model based on the Stoner–Wohlfarth magnetization mechanism, the strength of the magnetic coupling between the ferromagnetic layers is estimated to be 18 μJ m−2. This magnetic coupling, which is almost independent of temperature, is sufficient to promote the reversible switching of perpendicular magnetization states in the field range of a only few hundred Oersteds at room temperature.

Graphical abstract: Stabilization of perpendicular magnetic anisotropy in CeO2 films deposited on Co/Pt multilayers

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Publication details

The article was received on 22 Apr 2016, accepted on 04 Jun 2016 and first published on 06 Jun 2016


Article type: Paper
DOI: 10.1039/C6RA10392H
Citation: RSC Adv., 2016,6, 56785-56789
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    Stabilization of perpendicular magnetic anisotropy in CeO2 films deposited on Co/Pt multilayers

    N. Figueiredo-Prestes, J. Zarpellon, H. F. Jurca, V. Fernandes, J. Varalda, W. H. Schreiner, D. H. Mosca, P. F. P. Fichtner, Z. E. Fabrim, K. Bouzehouane, C. Deranlot and J. George, RSC Adv., 2016, 6, 56785
    DOI: 10.1039/C6RA10392H

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