Influence of strong disorder on superconductivity of MgB2 thin films
We investigated the influence of disorder on superconductivity of MgB2 films, prepared in a single deposition run onto two different substrates: (100)-MgO and on (128° rot)-LiNbO3 with trigonal crystal structure which does not match to the MgB2 structure. As expected, the microstructure of both...
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| Autores principales: | , , , , , , , , , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
D.Ghitu Institute of Electronic Engineering and Nanotechnologies
2008
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/ab44891fd5624361b44ad775706f6f8a |
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| Sumario: | We investigated the influence of disorder on superconductivity of MgB2 films, prepared
in a single deposition run onto two different substrates: (100)-MgO and on (128° rot)-LiNbO3
with trigonal crystal structure which does not match to the MgB2 structure. As expected, the
microstructure of both films crucially differs. The REM study shows a very homogeneous,
smooth morphology of the MgB2 film on MgO, but a very rough inhomogeneous film structure on LiNbO3. Although the MgB2 film on LiNbO3 is strongly disordered, its critical temperature Tc=33.5 K is practically the same as for the film deposited on MgO. Possible reasons
of such unusual Tc behavior are discussed. |
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