Anisotropy of the Faraday Rotation in Praseodymium Gallium Garnet Single Crystals

50 T pulsed magnetic fields in microcoils

“…10 If we assume that the Faraday rotation is proportional to M, which is itself linear with B across the entire field range, we can use the measured rotation at high fields to calculate the magnetic field at the surface of the sample. This is a reasonable assumption since all the samples are paramagnetic, with no observed saturation in the M vs B curves at 300 K even up to 50 T. 11 In addition, being insulators, there should be negligible sample heating during the current pulse. We can, thus, deduce B(t).…”

A theoretical study of the magnetic and magneto-optical properties of Nd-substituted yttrium iron garnets

“…This giant enhancement of the magneto-optical (MO) properties was observed in the near infra-red range first by Wemple et al [2] and later by other authors [3,4]. The experimental data on Nd:YIG were analysed in the frame of the approach using the following widely accepted hypothesis [3,5,6]: the Faraday rotation and magnetization (M) of Nd-substituted YIG (Nd:YIG) are simply the sum of the contributions of all the sublattices and the contributions of the Fe 3+ sublattices are not affected by the substitution of Nd 3+ because the superexchange interaction between the Fe 3+ and Nd 3+ ions is much weaker than that between different Fe 3+ ions. Therefore the Faraday rotation induced by the Fe 3+ sublattices in Nd:YIG is nearly identical to that of pure YIG (FR(YIG)) under the same experimental conditions, and the Nd 3+ -sublattice-induced Faraday rotation (FR(Nd)) is equal to the difference of FR(Nd:YIG) (the resultant Faraday ¶ Addressee for correspondence.…”