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Journal of Applied Physics -- May 15, 2002 -- Volume 91, Issue 10, pp.
8272-8274

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Anomalous switching behavior of antiparallel-coupled Co layers separated by
a super thin Ru spacer

     V. S. Gornakov and V. I. Nikitenko
     Institute of Solid State Physics, Russian Academy of Sciences,
     Chernogolovka 142432, Russia
     National Institute of Standards and Technology, Gaithersburg, Maryland
     20899

     W. F. Egelhoff, Jr., R. D. McMichael, A. J. Shapiro, and R. D. Shull
     National Institute of Standards and Technology, Gaithersburg, Maryland
     20899

The details of the magnetization reversal in coupled ferromagnetic Co/Ru/Co
trilayers deposited on obliquely sputtered Ta underlayers were studied using
the magneto-optical indicator film technique. The ground states of the
sandwich are characterized by noncollinear magnetization orientations in the
two Co layers, which can be remagnetized by the motion of 180° and non-180°
domain walls. In the latter case, the angle between the magnetization
vectors in the adjacent domains was revealed to be about ±100°, and an
anomalous magnetization reversal was observed. The canted magnetization
states and their mutual transformations are discussed in terms of the
competition between ferromagnetic coupling through pinholes and
antiferromagnetic coupling across the Ru layer.

doi:10.1063/1.1452706
PACS: 75.70.Cn, 75.50.Cc, 75.60.Jk, 75.70.Kw, 78.20.Ls, 75.25.+z, 75.30.Et
       Additional Information

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References

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