The 141st AMCP Open Seminar

Monday, March 25, 2019, 15:00-16:00

National Institute for Materials Science (NIMS)
Sengen Main Bldg. 8F Middle Seminar Room → access

Pre-registration is not required.
For inquiries, please contact the Administrative Office.
This lecture is open to the public. Your participation is strongly encouraged.

Kohji Nakamura, Associate Professor (Graduate School of Engineering, Mie University, Japan)

Role of atomic-layer stacking to magnetocrystalline anisotropy in metal thin-films

Efforts in searching materials with a large perpendicular magnetic anisotropy (PMA) have continued in multilayer thin films in which the PMA may be achieved by tuning atomic-layer alignments.[1] Here, by using film full-potential linearized augmented plane wave method,[2] the role of atomic-layer stacking to the magnetocrystalline anisotropy (MCA) in metal thin films is presented. First, the effect of structural asymmetry to the MCA of Co-Pt/Pd-based multilayers is discussed, where an asymmetric stacking, i.e. the Co/Pd/Pt-multilayer, induces a large PMA compared to that of the symmetric Co/Pt and Co/Pd multilayers. Next, the atomic-layer alignment dependence to the MCA in the Co-Fe multilayers on MgO(001) is analyzed. It is indeed found that although the MCA complicatedly behaves to the atomic-layer alignments, there is a key atomic-layer alignment for the large PMA.

[1] K. Hotta, et.al., PRL110, 267206 (2013).
[2] K. Nakamura, et. al., PRB67, 014420 (2003).