Non-isovalent substitution of Ba2+ in superconducting YBa2Cu3O7−y

Rajarajan, A. K. ; Guptasarma, P. ; Palkar, V. R. ; Ayyub, P. ; Multani, M. S. ; Gupta, L. C. ; Vijayaraghavan, R. (1988) Non-isovalent substitution of Ba2+ in superconducting YBa2Cu3O7−y Physica C: Superconductivity, 153-155 . pp. 894-895. ISSN 0921-4534

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We report the structural, magnetic and superconducting properties of YBa2−xMxCu3O7 (M=La3+ or K+). Single-phase compounds form over a wide range of x in YBa2−xMxCu3O7 and up to x = 0.2 in YBa2−xMxCu3O7. A substituent concentration of 15% triggers an orthorhombic to tetragonal phase15 transition in both systems. In spite of the associated disorder in the Cu(1)-0(1) chains, such a transition does not affect Tc drastically. Tc gets systematically depressed with increasing x. A temperature-dependent paramagnetic response is observed in YBa2−xMxCu3O7 between 90 and 300K.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:61888
Deposited On:15 Sep 2011 11:48
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