Fundamental study of thermodynamic analysis of nonequilibrium and equilibrium organization formation process

To study the organization formation mechanism and the controlled factors of pattern formation of Fe-Cu-Nb-Si-B nano-crystal alloy and Co-Al-O granular film, they had investigated by neutron and X-ray small-angle scattering measurement, differential scanning calorimetry and electron microscope. The generation and crystallization process of amorphous were simulated by the molecular dynamic method. The more the average particle size of Fe-Si phase is small, the more the magnetic permeability of Fe-Cu-Nb-Si-B nano-crystal alloy is large. The composition of Fe-Si phase is controlled by Cu clustering behavior, because nucleation of Fe-Si phase was produced on the Cu cluster. On Co-Al-O granular film, the relation between micro organization and the amount of tunnel type magnetic reluctance (TMR) of film became clear. Formation of amorphous alloy, structure relaxation and crystallization process of Ti-Al system was analyzed by the molecular dynamic method. The amorphous alloy of the system were consisted of three parts such as atoms configured to icosahedron, crystal and large free volume. They form some nanometer structures. During the relaxation process of structure, amorphous changed to two states, stable amorphous and the initial stage of crystallization, depending on amorphous formation ability. (S.Y.)