[19p-P1-1~74] 10 Spintronics and Magnetics（Poster）

△ [19p-P1-1] Effect of unsteady flow to magnetic orientation particles in rotating container
-Visualization of flow in the rotating container-

〇(M1C)Ryota Jonishi¹, Tsutomu Ando¹, Noriyuki Hirota² (1.Nihon Univ., 2.NIMS)

Keywords:flow simulation,magnetic orientation

In recent years, the development in superconducting technologies has enabled us to attain magnetic fields of up to 10 T, and as a result, feeble magnetic particles have been tested to orientate of which they have been called non-magnetic. There are researches which aim at improving material’s physical properties by controlling the direction of particles and crystals by magnetic anisotropy. In this case, it’s necessary to apply rotating magnetic field to accomplish a tri-axis orientation of particles. However the superconducting magnet is too large to rotate. Therefore, in current studies, a container with particles which are dispersed in solvent is rotated in a static magnetic field to apply a rotating magnetic field. However the unsteady flow of the solvent due to the rotation of container disturbs the orientation of the particles, and it might occur defects in materials.Therefore, we have been researching the flow in the rotating container, and our previous study reported that the simulation of the behavior of fluid in the rotating container. It is known that the velocity gradient of the solvent’s flow is increased near the Ekman layer under unsteady state. In this study, we estimate the fluid’s behavior of the two conditions that closed container and opened container. We will make a container which has the same dimensions as simulations, and moreover report the results of visualization experiment of the flow to verify the simulations.