Applications of 1 MV field-emission transmission electron microscope.
A newly developed 1 MV field-emission transmission electron microscope has recently been applied to the field of superconductivity by utilizing its bright and monochromatic field-emission electron beam. This microscope allows individual magnetic vortices inside high-Tc superconductors to be observed, thus, opening the way to investigate the unusual behaviour of vortices, which reflects the anisotropic layered structure of these superconducting materials. One example is the observation of the arrangements of chain vortex lines that are formed when a magnetic field is applied obliquely to the layer plane of the materials.
Tonomura
Akira
A
Advanced Research Laboratory, Hitachi, Ltd, Hatoyama, Saitama 350-0395, Japan. tonomura@harl.hitachi.co.jp