Investigation of effect of x in Yb(1-x)Gd(x)Ba(2)Cu(3)O(7-y) superconducting structures on upper critical magnetic field and coherence length


Celik S., Ozturk K., Yanmaz E.

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

Özet

The resistivity measurements of the Yb(1-x)Gd(x)Ba(2)Cu(3)O(7-y) superconducting samples prepared by using the solid-state reaction technique for x=0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 were performed in QD-PPMS system under different magnetic fields up to 5T in zero field cooling regime. The upper magnetic field H(c2)(T=0) for each sample was calculated from 50% of the normalized resistivity (R(n)) by the extrapolation H(c2)(T) to T=0K and the coherence lengths xi(T=0) of the samples were calculated from the H(c2)(0) values. The examination of the effects of x in the composition on H(c2)(0) showed us that the upper critical magnetic field decreased from 186.31T for x=0.0 to 37.99T for x=1.0 with the increasing of content x from x=0.0 to 1.0. Using the content x in the composition, the upper critical magnetic field can be controlled and this can be used in superconducting application especially as a superconducting relays.