Observation of splintered Josephson vortices at grain boundaries in YBa(2)Cu(3)O(7-delta).
We have directly observed well-separated Josephson vortex splinters with unquantized magnetic flux at asymmetric 45 degrees grain boundaries in YBa(2)Cu(3)O(7-delta) films by imaging magnetic flux with scanning SQUID microscopy. The existence of these splinter vortices has been predicted and is well described by a model based on dx(2)(-y(2)) pairing symmetry and facetting of the grain boundary on a length scale shorter than the Josephson penetration depth.
School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Israel.
R G
RG
Mints
Ilya
I
Papiashvili
J R
JR
Kirtley
H
H
Hilgenkamp
G
G
Hammerl
J
J
Mannhart