Ion-beam-induced magnetic and structural phase transformation of Ni-stabilized face-centered-cubic Fe films on Cu(100)

J. Gloss, S. Shah Zaman, J. Jonner, Z. Novotny, M. Schmid, P. Varga, M. Urbánek

Institut für Angewandte Physik, Technische Universität Wien, 1040 Wien, Austria
Institute of Physical Engineering, Faculty of Mechanical Engineering, Brno University of Technology, 616 69 Brno, Czech Republic
Comsats Institute of Information Technology, 44000 Islamabad, Pakistan
CEITEC BUT, Brno University of Technology, 616 00 Brno, Czech Republic

Appl. Phys. Lett. 103 (2013) 262405

Metastable face-centered cubic (fcc) Fe/Cu(100) thin films are good candidates for ion-beam magnetic patterning due to their magnetic transformation upon ion-beam irradiation. However, pure fcc Fe films undergo spontaneous transformation when their thickness exceeds 10 ML. This limit can be extended to approximately 22 ML by deposition of Fe at increased CO background pressures. We show that much thicker films can be grown by alloying with Ni for stabilizing the fcc gamma phase. The amount of Ni necessary to stabilize nonmagnetic, transformable fcc Fe films in dependence on the residual background pressure during the deposition is determined and a phase diagram revealing the transformable region is presented.

Corresponding author: Michal Urbánek. Reprints also available from M. Schmid (schmid at iap_tuwien_ac_at).

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