Fig. 3
From: Discovery of a magnetic conductive interface in PbZr0.2Ti0.8O3 /SrTiO3 heterostructures
Sagnac interferometer and MOKE measurements. a Schematics of the all-fiber Sagnac interferometer. b Kerr effect during 0 Oe warmup and (c) 1000 Oe cool-down for three STO (5, 10, 20 nm)/PZT/DSO samples with the same 50 nm PZT thickness. d Kerr signal image mapping over a 60 × 60 μm2 scan area in the STO (5 nm)/PZT/DSO sample at 130 K. Scale bar, 15 μm. e, f Kerr signal image mapping in the same region at 4 K under 1000 Oe and 0 Oe field, respectively, both showing uniform ferromagnetism signal distribution. Scale bar, 15 μm
