Title :
Time dependence of GMR in granular alloys
Author :
Greaves, S.J. ; Grady, K.O. ; Watson, M.L. ; Chantrell, R.W.
Author_Institution :
SEECS, Gwynedd, UK
fDate :
11/1/1995 12:00:00 AM
Abstract :
We have studied time dependent effects in NiFeAg granular alloy films at low temperatures. Measurements of the time dependence of magnetisation and resistivity have been made at 5 K. We have observed large time dependent changes in the magnetisation but much smaller changes in the resistivity at similar applied fields. The time dependence of magnetisation exhibits a peak in the magnetic viscosity at fields near to the coercivity whereas the resistivity time dependence is much smaller. We interpret this effect in terms of a simple approach relating the resistivity to M2
Keywords :
coercive force; discontinuous metallic thin films; ferromagnetic materials; giant magnetoresistance; iron alloys; magnetisation; magnetoresistance; nickel alloys; silver alloys; 5 K; NiFeAg; NiFeAg films; coercivity; giant magnetoresistance; granular alloys; low temperatures; magnetic viscosity; magnetisation; resistivity; time dependence; Conductivity; Giant magnetoresistance; Magnetic field measurement; Magnetic films; Magnetic hysteresis; Magnetic materials; Magnetization; Temperature dependence; Temperature distribution; Time measurement;
Journal_Title :
Magnetics, IEEE Transactions on
