  Spacer thickness and electrical conditioning have their own influence in
enhancing giant magnetoresistance (GMR) ratio. At some condition one factor can
override the other as reported by experiment results. An empiric model about
competition about these two factors is discussed in this work. Comparison from
experiment results to validate the model are also shown and explained. A
formulation is proposed to extend the existing one that now accommodates both
spacer thickness and electrical conditioning in one form.
