For the first time the semifluxons were observed at the tricrystal grain boundaries in d-wave superconductors and later in YBa 2 Cu 3 O 7 –Nb ramp zigzag junctions. In these systems the phase shift of π takes place due to d-wave order parameter symmetry in YBa 2 Cu 3 O 7 superconductor. The observations were performed using low temperature scanning SQUID microscope.