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Magnetic anisotropy and structure of epitaxial permalloy films sputter-deposited on Nb(110)

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5 Author(s)
Loloee, R. ; Department of Physics and Astronomy, Center for Sensor Materials and Center for Fundamental Material Research, Michigan State University, East Lansing, Michigan 48824 ; Urazhdin, S. ; Pratt, W.P. ; Geng, H.
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Epitaxial Permalloy™ (Py) thin films sputter-deposited onto epitaxial Nb with and without a Cu buffer layer have been investigated. Transmission electron microscopy was used to characterize the morphology of the Nb/Py/Cu and Nb/Cu/Py multilayers. Rotational magnetization measurements indicated significant differences in the magnetic anisotropy of the films. A phenomenological model taking into account uniaxial anisotropy agree well with the data, and provides a simple method for determinating the anisotropy strength. The correlations between the crystal structures and the magnetic properties are discussed. © 2004 American Institute of Physics.

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Applied Physics Letters  (Volume:84 ,  Issue: 13 )