Title :
Dynamic observation of superconducting vortices near pinning centers using electron waves
Author_Institution :
Adv. Res. Lab., Hitachi Ltd., Saitama, Japan
Abstract :
Superconducting vortices were directly and even dynamically observed by using the wave nature of electrons thanks to the development of a “coherent” field-emission electron beam. Magnetic lines of force of vortices were quantitatively observed as phase contour lines in a holographic interference micrograph and their dynamics were observed by Lorentz microscopy. The interaction of vortices with both line-and point-defects was investigated by direct observation
Keywords :
electron microscopy; flux pinning; high-temperature superconductors; interference (wave); microscopy; superconducting thin films; Lorentz microscopy; Nb; electron waves; electrons; field-emission electron beam; holographic interference micrograph; line-defects; magnetic lines; phase contour lines; pinning center; point-defects; superconducting vortices; vortices; wave nature; Electron beams; Electron microscopy; Holography; Interference; Laser beams; Magnetic field measurement; Magnetic flux; Magnetic force microscopy; Optical films; Phase detection;
Conference_Titel :
Micro Electro Mechanical Systems, 1996, MEMS '96, Proceedings. An Investigation of Micro Structures, Sensors, Actuators, Machines and Systems. IEEE, The Ninth Annual International Workshop on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-2985-6
DOI :
10.1109/MEMSYS.1996.493843
