On the influence of nanometer-thin antiferromagnetic surface layer on ferromagnetic CrO 2

P. Das, A. Bajpai, Y. Ohno, H. Ohno, J. Müller

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3 Citations (Scopus)

Abstract

We investigate the influence of naturally grown 2-5 nm thin surface layer of antiferromagnetic (AFM) Cr 2O 3 on the half metallic ferromagnet CrO 2 by measuring the magnetic behavior of a single micro-crystal. The temperature variation of the magnetic stray fields of the micro-crystal measured by micro-Hall magnetometry shows an anomalous increase below ∼ 60 K. We find clear evidence that this behavior is due to the influence of the AFM surface layer. The average amplitude of the Barkahausen jumps exhibits a similar temperature dependence indicating that the AFM surface layer plays a role in defining the potential landscape seen by the domain configuration in the ferromagnetic grain.

Original languageEnglish
Article number053921
JournalJournal of Applied Physics
Volume112
Issue number5
DOIs
Publication statusPublished - 2012 Sep 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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