Direct observation of microscopic inhomogeneities in high-Tc superconductors using energy-dispersive diffraction of synchrotron-produced xrays

Autor: Skelton, Earl F., Qadri, Syen B., Osofsky, Michael S., Drews, A. R., Broussard, P. R., Hu, J. Z., Finger, L. W., Vanderah, Terrell A., Kaiser, D., Peng, J. L., Anlage, Steven M., Greene, Richard L., Giapintzakis, John
Přispěvatelé: Giapintzakis, John [0000-0002-7277-2662]
Jazyk: angličtina
Rok vydání: 1995
Předmět:
Zdroj: Proceedings of SPIE-The International Society for Optical Engineering
Popis: Evidence of micron-sized structural inhomogeneities in several high transition temperature (T c) superconductors is presented. By illuminating samples with high energy, highly collimated x rays produced on a synchrotron wiggler, small changes in the lattice were detected over a spatial scale as small as 10 micrometer. In the YBa 2Cu 3O 7-δ crystals, these changes are interpreted as evidence of variations in the oxygen content and in the Nd 2-xCe xCuO 4-y crystal, as a variation in the cerium content. Each type of inhomogeneity can affect the superconducting properties. 2516 160 169 160-169
Databáze: OpenAIRE