DOMAIN STRUCTURE AND MAGNETIC PROPERTIES OF TERBIUM FERRITE-GARNET IN THE VICINITY OF THE MAGNETIC COMPENSATION POINT

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.

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