Magnetooptic Properties of Bismuth-Substituted Ferrite–Garnet Films in Strong Pulsed Magnetic Fields

Giant widening of interface magnetic layer in almost compensated iron garnet

“…The film had the magnetic compensation temperature from 50 K to 78 K, according to preliminary magnetooptical measurements of the domain structure (Fig. 1, a characteristic domain size increased dramatically in the vicinity of the compensation temperature) and a temperature dependence of the transition field to the canted phase [22].…”

“…Recently, the magneto-optical Faraday effect in thin film (Lu 3−x Bi x )(Fe 5−y−z Ga y Al z )O 12 deposited on Gd 3 Ga 5 O 12 (GGG) substrate under high magnetic field was investigated [22]. In the vicinity of the compensation temperature, a precursor of the transition from the collinear to canted magnetic structure was observed.…”

“…The sample was from the same batch as in Ref. [22]. Due to the bismuth substitution, the Faraday rotation at a wavelength of 633 nm, which was used in our experiments, was sizably enhanced and exceeds 8 deg.…”

“…The Faraday rotation in the film was measured by modified technique developed earlier [22] (Fig. 2).…”

“…The auxiliary polarizers (LP) were used for optimization of the light intensities at the photodetectors. The normalized difference (I 1 − I 2 )/(I 1 + I 2 ) allowed us to determine the angle of Faraday rotation [22]. The signal normalization effectively suppressed a drift and fluctuations of the laser intensity.…”