Domain Structure and Magnetic Properties of Terbium Ferrite-Garnet in the Vicinity of the Magnetic Compensation Point

Abstract

The domain structure of a thin single crystal plate of the iron garnet Tb3Fe5O12 has been investigated using the magneto-optical method in the temperature range near the magnetic compensation point of this ferrimagnet Tc = 248.6 K. It has been shown that, when the temperature of the sample approaches the magnetic compensation point, the domain width significantly increases, but remains finite at T = Tc. The magnetic H-T phase diagram determines the boundary between the multi domain and domain free (uniformly magnetized) states of the sample. Here the magnetic H-T phase diagram has been constructed using the data on visual observations of the transformation of the domain structure with variations in the temperature and external magnetic field.

Temperature Dependences of the Initial Permeability of Lithium-Titanium Ferrites Produced by Solid-State Sintering in Thermal and Radiation-Thermal Modes

“…Sintering of lithiumtitanium ferrites under specific conditions of a combined effect of high temperatures and intense electron fluxesis the most well studied process [20][21][22]. The patterns of ferrite compaction were revealed, and a multiple increase in the compaction rate of lithium-titanium ferrites under these sintering conditions was shown [23][24][25]. Magnetic properties of ferrimagnets are the key functional properties.…”

Magneto-Optical Properties of Rare-Earth Terbium Ferrite-Garnet in the Near the Temperature of the Orientation Phase Transition

“…Magneto-optical visualization of the domain structure of these crystals, as well as its evolution under the action of mechanical stresses, external magnetic field, and temperature, was used as the main method for studying orientational phase transitions in REFG. In addition, the dynamics of domain walls, magnetic hysteresis loops, and the magnetic susceptibility of REFG were studied using the Faraday effect [10][11][12][13][14][15][16][17][18].…”