Electron microscopic observation at low temperature on superconductors
- 1. Okayama Univ. of Science (Japan)
Description
The authors have observed superconducting materials with a high resolution electron microscope at liquid helium temperature. First, observation was carried out on Nb system intermetallic compounds such as Nb3Al and Nb3Sn of Al 5 type and Nb3Ge of 11 type at extremely low temperature. Next, the observation of high temperature superconductive ceramics in the state of superconductivity was attempted. In this paper, first the development of the liquid helium sample holder for a 400 kV electron microscope to realize the observation is reported. Besides, the sample holder of Gatan Co. and an extremely low temperature, high resolution electron microscope with a superconducting lens are described. The purpose of carrying out the electron microscope observation of superconductors at low temperature is the direct observation of the crystalline lattice image in the state of superconductivity. Also the structural transformation from tetragonal crystals to rhombic crystals in Al 5 type superconductors can be observed. The results of observation are reported. (K.I.)
Additional details
Publishing Information
- Imprint Title
- Proceedings of 1990-workshops of the working group on 'development and application of facilities for low temperature irradiation as well as controlled irradiation'
- Imprint Pagination
- 153 p.
- Journal Page Range
- p. 73-77.
- Report number
- KURRI-TR--351
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 23028051
- Subject category
- S42: ENGINEERING;
- Descriptors DEI
- CERAMICS; ELECTRON MICROSCOPES; ELECTRON MICROSCOPY; INTERMETALLIC COMPOUNDS; NIOBIUM COMPOUNDS; PERFORMANCE; SAMPLE HOLDERS; SUPERCONDUCTORS
- Descriptors DEC
- ALLOYS; MICROSCOPES; MICROSCOPY; TRANSITION ELEMENT COMPOUNDS