Phase formation and superconductivity in [Y<inf>1 x</inf> Ca<inf>x</inf>] SrBaCu <inf>2.80</inf> (BO<inf>3</inf>) <inf>0.20</inf>O<inf>y</inf> with 0.10 ≤ x ≤ 0.50

A. G. Bustamante Domínguez, V. H. Barinotto C., J. Flores Santibañez, F. Garcia

Research output: Contribution to journalArticle

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Abstract

We report the phase formation and superconductivity in [Y1-xCax]SrBaCu2.80(BO3) 0.20Oy with 0.10≤ x ≤ 0.50 prepared at normal pressure and temperature. The X-ray diffraction pattern shows that all samples have a tetragonal P4/mmm structure, indicating that the BO3 groups were incorporated in the structure. The ZFC magnetization versus temperature measurements under an applied field of 10 Oe using a SQUID magnetometer, show that the materials are superconductors, with Tc ≈ 77K, almost independently of the Ca content. The observed differences are related to the volume fraction of Meissner effect. In the temperature range 100-300K all samples show a typical Curie - Weiss behavior, under an applied high field of 20 KOe. © 2000 Elsevier Science B.V. All rightsreserved.
Original languageAmerican English
Pages (from-to)635-636
Number of pages2
JournalPhysica C: Superconductivity and its Applications
StatePublished - 1 Dec 2000

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