Electrical resistivity of some La-Sr-Nb oxides to 77 K |
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Authors: | M. P. Srinivasan S. N. Vaidya |
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Affiliation: | Chemistry Division , Bhabha Atomic Research Centre , Bombay, 400 085, India |
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Abstract: | The electrical resistivity of compounds having compositions LaSr2Nb x ,O y LaSrNb x O y , and La2SrNb x O y , prepared by arc melting under argon atmosphere, is determined from 77 to 300 K. Low resistivity compositions are found in these systems for x > 2 and niobium in divalent state. None of the compounds investigated showed large resistance drop reported by Oguchi et al. (1987) in La-Sr-Cu-O compounds prepared by sputtering La2CuO4 on niobium substrate and attributed to possible superconductivity about 250 K. |
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Keywords: | Electrical properties oxides superconductivity |
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