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Laboratory for Spectroscopy of Condensed Matter Physics

Research

Magneto-optical probes of spin dynamics

We obtain information about magnetic states experimentally by monitoring Faraday or Kerr rotation angles in transmission and reflection geometries, respectively. Also, we obtain a basic understanding about the spin dynamics from numerical simulations, namely, micromagnetic simulation for the ferromagnet and atomic simulation for the antiferromagnet.

Tracing real-space spin wave propagation

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 polarized electron dynamics

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.

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