Manifestation of unidirectional exchange anisotropy in ferrite-garnet films with a “weak” sublattice

Manifestations of the effects of a “weak” sublattice in an YIG film with the replacement of yttrium by Gd ions

“…Experiments were performed at the ambient temperature. Figure 1 shows the frequency-field dependence of the fundamental mode of the FMR for the negative (H-) and positive (H+) external magnetic fields that are normal to the surface of the film (Higher-order modes, detected for this sample in [6], were not generated in this experiment).…”

“…In second pot was grown a uniaxial film with the required thickness for bubbles magnetic domain devices. Both these and earlier investigations [5,6] were conducted on this film of submicron thickness, which was grown on the substrate during the transfer time of it from the first crucible to another. The width of ferrimagnetic resonance (FMR) line for these films was ~30-40 Oe, while that for pure YIG was ≤ 0.5 Oe.…”

“…To determine the form of the dependence of the saturation magnetization on temperature and the search for the compensation point, measurements of the values of the normal field of the transferring film to the saturation state were made for different temperatures. Such measurements were made to supplement and confirm the results and conclusions [6]. The measurements were performed from the records of the change in the magnetic susceptibility of the sample at a frequency of 5 MHz using the autodyne oscillator method [9].…”

Rotational remagnetization and orientational transitions in submicron YIG films

“…With an increase in the polar angle of application of the field to the normal, the value of the gap in the spectrum of the frequency-field dependency increases, and the field OT2 decreases in absolute value. 4. The presence of unidirectional anisotropy, in addition to the shift of the frequency-field dependency, leads to an additional asymmetry in the FMR spectrum -the sizes of the gaps for direct and reverse magnetization turn out to be different.…”

“…Variation of the derivative of magnetic susceptibility with quasinormal external (θH =1 deg.) field[4] for a range of azimuthal angles (φH) separated by an interval of 2 deg. (ν = 300 MHz at room temperature).…”