@article{oai:nagoya.repo.nii.ac.jp:00007104,
 author = {Yamato, T. and Kume, T. and Kato, T. and Tsunashima, S. and Nakamura, T. and Fujiwara, Y. and Iwata, S.},
 issue = {11},
 journal = {JOURNAL OF APPLIED PHYSICS},
 month = {Dec},
 note = {(001)-oriented Ni80Fe20/Mn100−x Ptx and Co90Fe10/Mn100−x Ptx epitaxial bilayers were prepared using the molecular beam epitaxy method. Their exchange anisotropies were measured using a torque magnetometer, while their interfacial Mn uncompensated moments were measured by means of x-ray magnetic circular dichroism. The bilayers exhibited both one- and fourfold components in their anisotropy torque curves, which are difficult to explain using a simple model assuming the coherent rotation of ferromagnetic (F) and antiferromagnetic (AF) spins. Uncompensated Mn moments were confirmed to exist in the Mn100−x Ptx layer due to exchange coupling with the adjacent F layer, and the Mn moment of CoFe/Mn100−x Ptx was found to be larger than that of NiFe/Mn100−x Ptx. In order to understand the experimental results, we extended the Mauri et al. [J. Appl. Phys. 62, 3047 (1987)] domain wall model by assuming cubic anisotropy in the AF and four AF domains whose interfacial moments are oriented along the principal axis of (001)-oriented Mn–Pt. The model predicted the uncompensated AF moment resulting from the domain wall formed in the AF layer and well reproduced the coexistence of one- and fourfold anisotropies in the in-plane torque curves. The uncompensated moment and torque curve were found to be dependent on the ratio of F/AF interfacial exchange coupling and the AF domain wall energy. By changing the ratio, it was possible to reproduce exchange anisotropy for various systems, such as NiFe/MnPt, NiFe/MnIr, and CoFe/MnPt.},
 pages = {113907--113907},
 title = {X-ray magnetic circular dichroism studies of (001)-oriented NiFe/Mn_100-x Pt_x exchange bilayers},
 volume = {100},
 year = {2006}
}