Journal of Applied Physics
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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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