Studies on structural and magnetic properties of melt textured growth YBa(2)Cu(3)O(7-x) superconducting bulk materials


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Gokay U. S. , Tepe M.

International Conference on Superconductivity and Magnetism (ICSM), Side, Türkiye, 25 - 29 Ağustos 2008, cilt.153

Özet

In this study, production methods and the structural and magnetic properties of melt-textured growth of YBa(2)Cu(3)O(7-x) bulk superconductors are discussed. During the research; various temperatures for melt texturing are tried for the optimization of the production of bulk YBCO. With the help of AC magnetic susceptibility measurements, some insights for the produced samples are handed out including critical phase transition temperatures and the effects of crystal growth inside the YBCO samples. XRD measurements showed bigger and greater number of crystal growth in a correlation with the increasing temperature and the microphotographs of the samples verified successive growth of YBCO crystals inside the samples. Sharper phase transition is reached with the increasing texturing temperature. Top seeding for the selected crystal orientation has also been tried at the 1070 degrees C for the texturing temperature, but the resulting melt textured sample was not different with the only-textured sample in the means of magnetic properties. Optimization over the texturing temperature found out to be between 1070 degrees C and 1080 degrees C while this result only depends on magnetic and structural properties.