Abstract
The results of micro-structural and detailed magnetization studies are reported here for our recently published TbSr 2Cu 2.7Mo 0.3O 7+ δ superconductor with a transition temperature ( T c) at as high as 80 K [V.P.S. Awana, A. Gupta, H. Kishan, E. Takayama-Muromachi, T. Watanabe, M. Karppinen, H. Yamauchi, S.K. Malik, W.B. Yelon, V. Ganesan, A.V. Narlikar, Solid State Commun. 129 (2003) 117]. From XRD and EDX the sample was confirmed to be of single-phase and possess the nominal cation stoichiometry. The SEM images showed well-developed grains for this ceramic high- T c superconductor. Magnetization measurements at various temperatures and fields revealed bulk superconductivity below 80 K. Magnetization versus applied field ( M vs H) loops at various temperatures below the T c exhibited clear full penetration field H P. In normal state (>100 K) the susceptibility follows the Curie–Weiss behavior with an effective paramagnetic moment of 9.83 μ B.
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