## Abstract By lowβtemperature transmission electron microscopy we have found nanodomains in a polycrystalline Nb~3~Sn sample. We interpret that these nanodomains form due to a tetragonal distortion. Because twinning seems to be a prominent feature of the real structure of many high __T__~c~ superc
Revealing the microstructure of NB3Ge superconducting films by transmission electron microscopy
β Scribed by A. T. Santhanam; P. M. Yuzawich
- Publisher
- Springer
- Year
- 1977
- Tongue
- English
- Weight
- 449 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0022-2461
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Nb3Ge films with thicknesses between 60 and 800 nm were deposited onto heated sapphire substrates by thermal coevaporation. Stoichiometric Nb3Ge samples crystallize in a single-phase A 15 structure with a lattice parameter of 5.14 ~. Critical current densities and upper critical magnetic inductions
Aluminium nitride samples sintered with various Y20: concentrations are characterized by transmission electron microscopy. Topology and second phase characteristics at grain boundaries are investigated by X-ray and diffraction experiments. At low Y:O~ concentrations (up to 10%) second phases (mainly