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|Título:||Superconducting depression in thin films of YBa2Cu3O7-¿ based on the variation of the relative humidity and the time|
|Palabras clave:||Física, Astronomía y Matemáticas|
Relative humidity and time
|Editorial:||Sociedad Mexicana de Ciencia y Tecnología de Superficies y Materiales A.C.|
|Descripción:||Thin films of YBa2Cu3O7- #948; grown on SrTiO3 (100) single crystal substrates by sputtering DC technique to high oxygen pressures were put under different conditions of relative humidity from 24 to 100% and different times of exposition. The electrical, morphologic and structural characteristics of the films by means of curves R-T, atomic force microscopy (AFM) and X-ray diffraction (XRD) were analyzed. The effect on structural and transport properties with the environmental conditions of relative humidity and with time were systematically studied. Samples under relative humidity around 24% measured just later of deposition showed a critical temperature (TC) of 92 K, and thin films exposed around 90% of relative humidity with times greater to 104 s (1 day) showed a TC of 16 K, while samples under a relative humidity 100% do not showed the superconductive phase. The degradation´s causes of superconductive properties in this system were investigated.|
|Aparece en las Colecciones:||Superficies y vacío|
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