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2 Electron Technology

2 1998

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Anisotropy inhomogeneity of soft magnetic thin films

Jang P. W., Choi T. W., Yu S. C.

Electron Technology

1998

Vol. 31, No. 1

65-69

Anisotropy inhomogeneity of rf sputtered permalloy thin films was measured using the TBP method. Angular distribution function showed the Lorentz distribution because of a long taol to high Hk. With increasing film thicknees, both the angular and magnitude anisotropy dispersion increased. This could be attributed to the increase of grain size and local anisotropy, as suggested by the Hoffmann ripple theory. However, the complex permeability calculated with both anisotropy inhomogeneity and eddy current effects taken into account did not match well the measured permebility.

Angular dependencies of longitudinal magnetoresistivity and planar hall effect of single and multilayered thin films

Ko T. W., Lee J. H., Park B. K., Jang P. W., Hwang D. G., Lee S. S., Kim M. Z., Rhee J. R.

Electron Technology

1998

Vol. 31, No. 1

70-79

Magnetoresistivity and planar Hall effect of a Glass/Fe₇₀Å/(Co₂₁Å/Cu₂₅Å)₂₀ multilayer coupled antiferromagnetically a single layer (Co₈₁Nb₁₉) thin film, and NiO based Glass/NiO₃₅Å/Py₅₀Å/Cu₂₀Å/Py₅₀Å spin valve spin valve are studied. Planar Hall resistivity is analyzed concurrently with the resistivity of each sample. With variation of direction and strength of the applied fields, we found thwt the magnetization process affects significantly the planar Hall effect. We devwloped a simple method to find the easy axis of single layer magnetic thin films. We also observed the variation of magnetization of each layer separately for an antiferromagnetically coupled multilayer, and a NiO-based spin valve with the planar Hall effect.