Absence of weak antilocalization in ferromagnetic films

N. Kurzweil, E. Kogan, A. Frydman

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10 Scopus citations

Abstract

We present magnetoresistance measurements performed on ultrathin films of amorphous Ni and Fe. In these films the Curie temperature drops to zero at small thickness, making it possible to study the effect of ferromagnetism on localization. We find that nonferromagnetic films are characterized by positive magnetoresistance. This is interpreted as resulting from weak antilocalization due to strong Bychkov-Rashba spin-orbit scattering. As the films become ferromagnetic the magnetoresistance changes sign and becomes negative. We analyze our data to identify the individual contributions of weak localization, weak antilocalization, and anisotropic magnetoresistance and conclude that the magnetic order suppresses the influence of spin-orbit effects on localization phenomena in agreement with theoretical predictions.

Original languageEnglish
Article number235104
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume82
Issue number23
DOIs
StatePublished - 1 Dec 2010

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