Oxygen displacement in a 107Ag17+ ion irradiated Bi2Sr2CaCu2O8 single crystal

Sudershan, Y. S. ; Rastogi, Amit ; Bhat, S. V. ; Grover, A. K. ; Yamaguchi, Y. ; Oka, K. ; Nishihara, Y. ; Senapati, L. ; Kanjilal, D. (1997) Oxygen displacement in a 107Ag17+ ion irradiated Bi2Sr2CaCu2O8 single crystal Applied Physics Letters, 71 (11). 1576_1-1576_3. ISSN 0003-6951

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Official URL: http://apl.aip.org/resource/1/applab/v71/i11/p1576...

Related URL: http://dx.doi.org/10.1063/1.119969


We have studied the magnetic field (H∥c) dependent rf dissipation (Hrf∥a) in an as-grown Bi2Sr2CaCu2O8 single crystal prior to and after irradiation with 250 MeV 107Ag17+ ions. In a comparison of the responses from the as-grown crystal with an air-annealed crystal, features due to oxygen deficient regions acting as weak links in the former are identified. These features disappear immediately after irradiation of the as-grown crystal. We attribute such behavior to the displacement of oxygen from columnar tracks to deficient regions thus eliminating the weak links. Losses from the same irradiated as-grown crystal stored at 300 K for 60 days show that the features similar but not identical to those observed in the pristine state have reappeared implying that the displaced oxygen is in a metastable configuration in the deficient regions and hence is mobile due to thermal effects even at 300 K.

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