TY - GEN
T1 - Formation of superconductors by YAG laser irradiation of laminated thin layers
AU - Wada, H.
AU - Kuroda, T.
AU - Itoh, K.
AU - Yuyama, M.
AU - Morita, M.
AU - Murakami, M.
AU - Matsuda, S.
PY - 1989/12/1
Y1 - 1989/12/1
N2 - An Nb tape was coated with a C layer of controlled thickness (5-10 μm) by magnetron sputtering. A YAG laser irradiated the tape in argon atmosphere. The beam power was 10-100 W, depending on the velocity of the tape, and the diameter of the beam was a few hundred microns. The resultant NbC tape showed superconductivity around 10 K. The same reaction conditions were used in a nitrogen atmosphere. Superconductivity in these tapes was found to start above 15 K. In the process for Nb3Al tapes an Nb tape was first coated with Al and then with C. The irradiation was performed under nearly the same reaction conditions as those for NbC. Superconductivity was found around 14 K, which is somewhat lower than values reported previously. This was attributed to an excess of C in the surface interstitially dissolved in the Nb3Al structure. In all cases phase identification and microstructure observation were carried out by X-ray diffractometry, optical microscopy, and scanning electron microscopy.
AB - An Nb tape was coated with a C layer of controlled thickness (5-10 μm) by magnetron sputtering. A YAG laser irradiated the tape in argon atmosphere. The beam power was 10-100 W, depending on the velocity of the tape, and the diameter of the beam was a few hundred microns. The resultant NbC tape showed superconductivity around 10 K. The same reaction conditions were used in a nitrogen atmosphere. Superconductivity in these tapes was found to start above 15 K. In the process for Nb3Al tapes an Nb tape was first coated with Al and then with C. The irradiation was performed under nearly the same reaction conditions as those for NbC. Superconductivity was found around 14 K, which is somewhat lower than values reported previously. This was attributed to an excess of C in the surface interstitially dissolved in the Nb3Al structure. In all cases phase identification and microstructure observation were carried out by X-ray diffractometry, optical microscopy, and scanning electron microscopy.
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M3 - Conference contribution
AN - SCOPUS:0024929541
SN - 1557520860
T3 - CONFERENCE ON LASERS AND ELECTRO-0PTICS
SP - 354
EP - 356
BT - CONFERENCE ON LASERS AND ELECTRO-0PTICS
A2 - Anon, null
PB - Publ by IEEE
T2 - Summaries of Papers Presented at the Conference on Lasers and Electro-Optics
Y2 - 24 April 1989 through 28 April 1989
ER -