We have two projects: (1) ferromagnetic film materials and (2) semiconductor materials.

1. Ferromagnetic thin films
   Thin film materials show particular and/or interesting properties depending on the film-fabricating process, microstructure and the film shape. Therefore, the ferromagnetic films have been used as electronic materials such as 8-mm DVC media, hard-disk media, magneto-optical (MO) media, thin-film transformer, thin film head and so on.

   Since stacked magnetic films have unknown possibility to apply as electronic materials, our study is focusing on the stacked magnetic films such as bilayer and multi-layer films produced by vacuum technology.

   Fortunately, we have fruitful equipments concerning to the this project. Thin films with thickness less than 500 nm are produced by RF sputtering system with 3 targets, electron-beam gun evaporation system with 4 crucibles, ultra-high vacuum evaporation system, and are sometimes annealed by electrical furnace. The deposited films are characterized by vibrating sample magnetometer (VSM), 35-GHz ferromagnetic resonance (FMR) spectrometer and Faraday rotation M-H loop tracer. Electrical-resistance measurement apparatus, XRD, SEM and SQUID are also available in the near laboratories.

2. Semiconductor materials
   ZnSe and its related materials are of remarkable interest for optoelectronic devices like blue-green laser diodes and blue light emitting diodes. Our study aims to investigate, analyze and present the growth, emission and excitation spectra and the transition pressures of ZnSe, ZnS and ZnSe _xS_1-x single crystals.

Last modified: May 27, 2002