In the magnetically ordered states, spin waves (magnon) are defined, and can carry useful information to be utilized for the so-called magnonics application.
We are investigating spin wave propagations in ferromagnets, (canted) antiferromagnets, and ferrimagnets by examining their reflection, transmission, focusing, and so on, and look for an efficient way for the active control of the spin wave.
Spin angular momentum is carried also by an individual electron, and hence the control of spin-polarized electrons is nowadays an important issue in realizing non-dissipative spintronic devices.
We examine a spin-polarized electron transport in various (ferromagnetic) metallic systems and its efficient transfer to the other system through the interface.
