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Magnetic properties and creep observations of Ni-Fe films 30 to 300 Å thick

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2 Author(s)
D. Lo ; UNIVAC Division, Sperry Rand Corporation, St. Paul, MN, USA ; M. Hanson

Coercivity, induced uniaxial anisotropy field, angular dispersion, residual stress, magnetic domain wall, and magnetization creep of vapor-deposited 81.7 Ni-18.3 Fe films are reported. The thickness and temperature dependence of the coercivity and the induced uniaxial anisotropy field in the thickness range from 30 to 16 000 Å are described. A substrate temperature range is given for minimum residual stress. Lorentz micrographs of magnetic domain walls and magnetization creep of films in the thickness range from 30 to 300 Å are presented. It has been found that Néel walls creep under the influence of a unipolar hard-axis field pulse in the presence of a constant dc easy-axis field. The paper discusses the experimental results in the light of existing creep theories.

Published in:

IEEE Transactions on Magnetics  (Volume:5 ,  Issue: 2 )