Tailoring magnetic properties of metallic thin films with quantum well states and external electric fields

Thickness dependence of magnetic anisotropy energy (MAE) and spin polarization in Fe and Co multilayers on a Pt(001) substrate are investigated with ab initio techniques. As the thickness of the thin films is increased, an oscillatory behavior of the MAE of the systems is observed. For Fe multilayer...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2013-09, Vol.88 (10), Article 104409
Hauptverfasser: Dasa, T. R., Ruiz-Díaz, P., Brovko, O. O., Stepanyuk, V. S.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Thickness dependence of magnetic anisotropy energy (MAE) and spin polarization in Fe and Co multilayers on a Pt(001) substrate are investigated with ab initio techniques. As the thickness of the thin films is increased, an oscillatory behavior of the MAE of the systems is observed. For Fe multilayers, this even results in the periodic switching of the easy axis from out of plane to in plane. Capping the multilayers with Pt, in most cases, leads to a strong enhancement of the MAE. Our calculations give clear evidence that such oscillatory behavior of MAE can be attributed to spin-polarized quantum well states (QWS) existing in thicker multilayers. The spin polarization of the QWS is also shown to have a profound thickness dependence. Finally, we show that both MAE and spin polarization of the QWS are sensitive to external electric field and can be tailored therewith.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.88.104409