Dynamic observation of superconducting vortices near pinning centers using electron waves

Author

Tonomura, Akira

Author_Institution

Adv. Res. Lab., Hitachi Ltd., Saitama, Japan

fYear

1996

fDate

11-15 Feb 1996

Firstpage

139

Lastpage

145

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/MEMSYS.1996.493843

Filename

493843