Time Dependent Changes in Ag Doped YBCO Superconductors |
| D. Volochováa, b, V. Antala, b, P. Dikoa, M. Šefčikováa, K. Zmorayováa, J. Kováča, H.W. Weberb and X. Chaudc
aMaterials Physics Laboratory, Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovak Republic bVienna University of Technology, Atominstitut, Stadionallee 2, 1020 Vienna, Austria cCNRS/CRETA, 25, Avenue des Martyrs, 38042 Grenoble Cedex 9, France |
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| Magnetization measurements at 77 K were conducted on the single-crystalline samples of YBCO superconductor doped with Ag prepared by the top-seeded melt-growth process. The single-grain samples had a nominal composition Y1.5Ba2(Cu,Ag)3Oy. Magnetization measurements on the samples, oxygenated by two different processes: by standard oxygenation and by high pressure oxygenation, repeated after 24 months, revealed time dependent changes in magnetization behaviour and critical transition temperatures, Tc, which could be associated with redistribution of oxygen vacancies and their interaction with Ag dopant atoms. |
| DOI: 10.12693/APhysPolA.118.1047 PACS numbers: 74.25.Ha, 74.25.Sv, 74.62.Bf, 74.62.Dh, 74.62.Fj |