Overall, these plots indicate that the magnitude of the bottomside signals (Fig 6) tends to generally be higher than those of the topside (Figure 7), particularly at higher flux densities (figs 6(b) and 7(b)). Furthermore, the topside signals tend to be more significantly affected by stress, since the ‘gap’ between the topside curves is greater than that for the bottomside MFL. Finally, comparing flux density affects, the stress contribution to the MFL signal is at low flux densities (Figure 6(a) and Figure 7(a)) tends to be generally higher than at high flux densities.
Overall, these plots indicate that the magnitude of the bottomside signals (Fig 6) tends to generally be higher than those of the topside (Figure 7), particularly at higher flux densities (figs 6(b) and 7(b)). Furthermore, the topside signals tend to be more significantly affected by stress, since the ‘gap’ between the topside curves is greater than that for the bottomside MFL. Finally, comparing flux density affects, the stress contribution to the MFL signal is at low flux densities (Figure 6(a) and Figure 7(a)) tends to be generally higher than at high flux densities.