Fig. 3: SHG with applied magnetic field and M-H measurements.
From: Magnetoelectric coupling in multiferroics probed by optical second harmonic generation
a M-H diagrams of BFO/STO, BFO/SAO/STO, and freestanding BFO films transferred onto STO (001) substrates. b, c Schematic diagrams of the non-collinear G-type cycloid antiferromagnetic order in the freestanding BFO films with low strain and that in BFO/STO films with high strain, respectively. d Schematic diagram of the relationship between polarization P and cycloidal vectors k without the magnetic field. e Schematic diagram of the relationship between polarization P and cycloidal vectors k′ with the magnetic field. f–h Room temperature RA-SHG measurements of BFO/STO, BFO/SAO/STO, and freestanding BFO films without magnetic field, respectively. i–k Magnetic field-dependent SHG of BFO/STO, BFO/SAO/STO, and freestanding BFO films in the p-p polarization configuration, respectively. l–n Magnetic field dependent SHG of freestanding BFO films at 200, 250, and 300 K, respectively.
