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Transport properties of bicrystal Josephson junctions in Y-Ba-Cu-O films grown by liquid phase epitaxy

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9 Author(s)
Eltsev, Y.F. ; Superconductivity Res. Lab., Int. Superconductivity Technol. Center, Tokyo, Japan ; Nakao, Koichi ; Yamada, Y. ; Hirabayashi, Izumi
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We studied charge transport across 24°, 36°, 45° symmetrical and 45° asymmetrical grain boundaries (GB's) in YBCO bicrystals grown by liquid phase epitaxy (LPE). We show that transport properties of symmetrical GB's are similar to those in bicrystals formed by various physical vapour deposition (PVD) methods while for 45° asymmetrical GB's, a difference between transport properties of LPE and PVD bicrystals has been found. In particular, in contrast to PVD bicrystals, selected LPE samples demonstrate regular magnetic interference patterns. In an agreement with transmission electron microscopy data, this result suggests better quality of 45° asymmetrical GB's in LPE films

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Applied Superconductivity, IEEE Transactions on  (Volume:11 ,  Issue: 1 )