A new measurement system to obtain a proper value of disaccommodation intensity D was devised and applied to Metglas 2605SC and Fe 5 Co 7 Si 15 B 10 amporphous ribbons as received. The initial susceptibility χ, the stabilization field H o and the effective domain wall thickness δ were obtained from analysis of minor hysteresis loops at room temperature. The effects of a tensile stress σ along the long axis of the ribbons on χ, H o , D and δ were investigated. The inverse of susceptibility r and H o increased linearly with log t where t is the time after demagnetization δ was almost constant with t except at small σ. The disaccommodation intensity defined as D=Δχ/χ(t 1 ) was much greater than reported previously and was enhanced by σ.