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Oxygen displacement in a $^{107}Ag^{17+}$ ion irradiated $Bi_2Sr_2CaCu_2O_8$ single crystal

Sudershan, YS and Rastogi, Amit and Bhat, SV and Grover, AK and Yamaguchi, Y and Oka, K and Nishihara, Y and Senapati, L and Kanjilal, D (1997) Oxygen displacement in a $^{107}Ag^{17+}$ ion irradiated $Bi_2Sr_2CaCu_2O_8$ single crystal. In: Applied Physics Letters, 71 (11). pp. 1576-1578.

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We have studied the magnetic field $(H\Vert c)$ dependent rf dissipation $(H_{rf}\Vert fa)$ in an as-grown $Bi_2Sr_2CaCu_2O_8$ single crystal prior to and after irradiation with 250 MeV $^{107}Ag^{17+}$ 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.

Item Type: Journal Article
Publication: Applied Physics Letters
Publisher: American Institute of Physics
Additional Information: Copyright of this article belongs to American Institute of Physics.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 25 May 2007
Last Modified: 19 Sep 2010 04:35
URI: http://eprints.iisc.ac.in/id/eprint/10048

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