Switching Current Measurements of EuBa2Cu3Oy Intrinsic Josephson Junctions

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We investigated the switching dynamics of two kinds of EuBa2Cu3Oy (Eu123) intrinsic Josephson junctions (IJJs) with different anisotropy parameters gamma (= (m*c/m*ab)1/2) tuned to 37 and 22. In contrast to weakly-coupled IJJs in Bi2212, significant deviations from the thermally activated escape model of a single-stack Josephson junction were observed in their switching current distributions, P(I), due to the strongly-coupled nature of the Eu123 IJJs, The P(I) of the two IJJs are found to be independent of temperature, below 1.4 K and 4.2 K, respectively; which indicates the observation of macroscopic quantum tunneling at high temperatures of liquid He.
3 pages, 5 figures

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Superconductivity

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http://salesiana.dossiersoluciones.com/handle/123456789/128803

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0705.1651
 http://arxiv.org/abs/0705.1651

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arXiv