In situ visible surface magneto-optical Kerr effect studies of exchange bias formation in coupled ferromagnetic/antiferrmagnetic films

Fe$_{50}$Mn$_{50}$ ?????????????????? ???????????? Ta/Ni$_{81}$Fe$_{19}$/Co$_{90}$Fe$_{10}$/Cu/Co$_{90}$Fe$_{10}$/Fe$_{50}$Mn$_{50}$/Ta ????????? ?????? ????????????(top spin valve)??? ?????????/????????????/???????????? ????????? ????????? Ta/Ni$_{81}$Fe$_{19}$/Fe$_{50}$Mn$_{50}$/Co ?????? ????????? ???????????? ????????????(ultrahigh vacuum sputtering) ??? ????????? ??????(e-beam evaporation)?????? ???????????????. ????????? ??? ????????? ????????? ?????? ?????????????????? (exchange bias) ?????? ??????????????? ???????????? ?????? ?????? ????????? ??? ??????(surface magneto-optical Kerr effect)??? ???????????? ??? ?????? ????????????(Kerr rotation loop)??? ???????????????. ?????? ?????? ???, ?????? blocking ?????? ???????????? ?????? ??? ????????? ???????????? ?????? ????????? ????????? ????????? ?????????(unidirectional anisotropy)??? ???????????? ?????????????????? ????????? ???????????????. ?????????/???????????? ????????? blocking ?????? ???????????? ???????????? ????????????, ????????? ????????? ?????? ??????????????? ??????????????? ???????????? ????????????, ??????????????? ????????? ???????????? ?????? ??? ??????????????? ???????????? ???????????????. Fe$_{50}$Mn$_{50}$ ??????????????? ????????? ???????????? ?????? ?????? ??? ??????????????? ????????? ?????????/????????????/????????? ??????????????????, ?????? ????????? ????????? ???????????? ????????? blocking ?????? ???????????? ?????? ???????????? ???????????? ???????????? ????????????, ??? ????????? ????????? ???????????? ????????????????????? ?????? ??? ???????????? ???????????????. ?????? ??????????????? ??????????????? ?????????/???????????? ????????? ???????????? ????????????????????? blocking ?????? ???????????? ?????????????????? ???????????? ?????? ????????? ????????? ?????? ?????? ??????????????? ?????? ???????????? ??? ??? ??????.clos