EFFECT OF SILVER DOPING ON INFRARED REFLECTANCE AND Tc OF SUPERCONDUCTING GdBa2Cu(1−x)3Ag3xO7
1990 ◽
Vol 04
(11n12)
◽
pp. 1889-1894
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Infrared reflectance of GdBa 2 Cu (1−x)3 Ag 3xO7 ceramic superconductor with the composition of x=0.025 and 0.05 have been performed in the frequency range of 100–5000 cm−1. All the infrared active phonon modes allowed by the selection rules were observed in the reflection spectra of these compounds. The optical conductivity as calculated from K-K analysis further confirms the existence of these optical phonons. Besides the increase of the reflectivity in the silver doped samples, an extra phonon mode is observed, which is normally not seen at room temperature reflectance of GdBa 2 Cu 3 O 7 compounds. The four probe resistivity measurement show zero resistance at 88 K for x=0, and 78 K for x=0.025 in GdBa 2 Cu (1−x)3 Ag 3x O 7 compound.
2018 ◽
Vol 32
(06)
◽
pp. 1850067
◽
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