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No.3(pp.67-109)

Home > Issues > Volume 3 (1998) > No.3(pp.67-109)

The Effect of Pinholes on Magnetic Behaviour of Antiferromagnetically Coupled Ni-Fe/Cu Mulitlayers

Journal of Magnetics, Volume 3, Number 3, 30 Sep 1998, Pages 89-91

F. Stobiecki(Institute of Molecular Physics, Polish Academy of Sciences), T. Lucinski(Institute of Molecular Physics, Polish Academy of Sciences), J. Dubowik(Institute of Molecular Physics, Polish Academy of Sciences), B. Szymanski(Institute of Molecular Physics, Polish Academy of Sciences), M. Urbaniak(Institute of Molecular Physics, Polish Academy of Sciences), F. J. Castano(Institute of Applied Magnetism (IMA)), T. Stobiecki(University of Mining and Metallutry, Electronics Department)

Abstract

The magnetisation behaviour of polycrystalline permalloy/copper multilayers with mixed antiferromagnetic/ferromagnetic coupling was investigated as function of temperature. The results are discussed in a framework of a realistic model of anitferromagnetically coupled layers connected by ferromagnetic pinholes. A microstructure of pinholes (their density and dimensions) was varied either by a proper annealing treatment or by choosing samples with various Cu spacer thicknesses. It was demonstrated that the temperature changes of the net magnetic moment measured in a magnetic field smaller than the saturation field was strongly affected by the composition of the pinholes, their density, cross-sectional area and their lengths.

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