Accurate comparative measurement of oxygen content variations in YBa[sub 2]Cu[sub 3]O[sub 7-δ] films due to postdeposition annealing

Zhai, H. Y.; Zhang, Z. H.; Chu, W. K.
January 2001
Applied Physics Letters;1/29/2001, Vol. 78 Issue 5, p649
Academic Journal
Non-Rutherford elastic resonance scattering, [sup 16]O(α,α)[sup 16]O at 3.045 MeV, has been used to measure the change in relative oxygen content, δ of dc-sputtered YBa[sub 2]Cu[sub 3]O[sub 7-δ] (YBCO) films due to postdeposition annealing to a precision of 1%. Experimental results show that only 3.4% of the total amount of oxygen in YBa[sub 2]Cu[sub 3]O[sub 7-δ] is absorbed in the postdeposition annealing process, and this agrees with our x-ray diffraction data. The presence of oxygen during annealing, which leads to the transition to the superconducting orthorhombic structure, may also be understood as providing a more favorable environment for structure reformation, rather than only adding more oxygen into the YBCO film. © 2001 American Institute of Physics.


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