Diamagnetic shielding and Meissner effect in the high Tc superconductor Sr0.2La1.8CuO4

Autor:	Richard L. Greene, D. C. Cronemeyer, Johannes Georg Bednorz, A. P. Malozemoff, C.C. Tsuei, H. Maletta, Klaus Müller
Rok vydání:	1993
Předmět:	Superconductivity Materials science High-temperature superconductivity Condensed matter physics Chemistry General Chemistry Condensed Matter Physics Magnetic susceptibility law.invention Meissner effect law Electromagnetic shielding Materials Chemistry Shielding effect Diamagnetism Critical field
Zdroj:	Solid State Communications. 88:837-840
ISSN:	0038-1098
DOI:	10.1016/0038-1098(93)90252-i
Popis:	SQUID susceptibility measurements of the high Tc superconductor Sr0.2La1.8CuO4, with a 40 K resistive onset, are reported for fields from 1 μT to 4.5 T (10 mG to 45 kG). Data show an average lower critical field of 30 mT at 5 K, but with nonlinearities appearing as low as 100 μT. Zero field cooling and subsequent application of a field shows a diamagnetic shielding effect reaching 100% in the lowest fields with a 37 K onset and 31 K midpoint. The observed Meissner effect in single phase material exceeds 40% but decreases with oxygen annealing even though Tc increases.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c9f4b888e869364d74996a1896fb582 https://doi.org/10.1016/0038-1098(93)90252-i Zobrazit plný text záznamu