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Paramagnetic effect in YBaCuO grain boundary junctions

E. Il'ichev·F. Tafuri·M. Grajcar·R. P. J. IJsselsteijn·J. Weber·F. Lombardi·J. R. Kirtley
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Abstract

A detailed investigation of the magnetic response of YBaCuO grain boundary Josephson junctions has been carried out using both radio-frequency measurements and Scanning SQUID Microscopy. In a nominally zero-field-cooled regime we observed a paramagnetic response at low external fields for 45 degree asymmetric grain boundaries. We argue that the observed phenomenology results from the d-wave order parameter symmetry and depends on Andreev bound states.

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E. Il'ichev, F. Tafuri, M. Grajcar, R. P. J. IJsselsteijn, J. Weber, F. Lombardi, J. R. Kirtley. 2003-06-29. Paramagnetic effect in YBaCuO grain boundary junctions. https://doi.org/10.1103/physrevb.68.014510

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