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Title: Meissner effect and critical fields in an inhomogeneous Ba2HoCu3O7-x high-Tc superconductor
Author: Obradors, Xavier
Labarta, Amílcar
Tejada Palacios, Javier
Vallet Regí, María
González Calbet, José María
Keywords: Superconductivitat
Issue Date: 1988
Publisher: The American Physical Society
Abstract: The Meissner and diamagnetic shielding effects and the upper, lower, and thermodynamical critical fields have been studied in a Ba2HoCu3O7-x sample using magnetization measurements in fields up to 55 kOe. The diamagnetic shielding curve shows the existence of a transition at Tc=91.5 K followed by a broad transition extending from 85 to 25 K which may be related to inhomogeneities in the oxygen content of the sample. A rather low flux expulsion (13.5%) is observed which we attribute to flux pinning or trapping. We show that the coexistence of superconducting and nonsuperconducting regions within the sample at temperatures just below Tc leads to strong reductions in the critical magnetic fields.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 1988, vol. 38, núm. 4, p. 2455-2459.
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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