3.5 Conclusion

It can be inferred from the non-zero polarization values (figure 3.6) that the part of the multilayer structure (figure 3.4) within the penetration depth of the electron beam has a non-zero magnetization component along $[100]$ in the remanent state after application of a strong magnetic field in the $\pm [100]$ direction. This does not, of itself, demonstrate that the manganese and cobalt layers have parallel magnetizations, nor that the manganese layer is internally ferromagnetic. It does, however, demonstrate the feasibility of similar experiments (chapter 5) which will be capable of settling these issues.