2007 Volume 48 Issue 11 Pages 2872-2876
It is well known that the transport of atoms, ions and holes in a material is induced by electromigration. This implies that electromigaration can control the structure of a material. In this study, an electric current was applied to a titanium sample that was subjected to a static magnetic field to investigate the effects of the electric current and the static magnetic field on crystal alignment in titanium.
An intensity ratio of (002) peak to (100) peak in XRD analysis was introduced as a crystal alignment index.
Because the magnetic susceptibility of titanium in the c-axis is larger than what it is in the a-axis, titanium crystals having a c-axis parallel to the magnetic field are stable from the viewpoint of magnetization energy. However, the numbers of these crystals decreased after the experiment. On the other hand, the c-axis of the titanium crystals aligned themselves itself to become perpendicular to the direction of flow of the electric current to reduce the Joule loss in the sample, because the specific resistance in the c-axis was larger than that in the a-axis. This agrees with the experimental result.
Therefore, in this experiment the titanium crystals in the sample aligned themselves to reduce the Joule loss even though the magnetic energy was larger than the thermal fluctuation in this experiment.