磁性ナノ超構造の創製とスピンデバイスへの応用

摘要

The development of magnetic nanosized superstructures and their application to spintronics devices are surveyed. The anomalous Nernst effect in perpendicularly magnetized ordered thin films was investigated to help with the development of a new type of thermoelectric power generation device. Results showed that the anomalous Nernst effect could be quantitatively discussed even in nanoscale devices from a simulation using the finite element method. The combination of perpendicularly magnetized FePt and Cr wires enhanced the anomalous Nernst voltage effectively. A novel metal-free large magnetic anisotropy ferromagnetic thin film "Llo ordered FeNi with a large uniaxial magnetic anisotropy was fabricated by an alternative monatomic layer deposition. The uniaxial magnetic anisotropy constant of an FeNi layer grown on a Au-Cu-Ni underlayer showed a large magnetic anisotropy (K_u=7.0 ×10~6 erg/cm~3). It is expected that optimizing the lattice constant of the underlayer will lead to increased uniaxial magnetic anisotropy of L1_0 ordered FeNi thin films.