Abstract:
A detailed study of the magnetic and dilatometric properties of a series of HoFe$_{1-x}$Mn$_x$O$_3$ single crystals at low concentrations of manganese ($x$ = 0.05, 0.1) was carried out to refine the magnetic phase diagram in the region of low concentrations manganese. From the results of measurements of magnetization and relative deformation carried out on a series of HoFe$_{1-x}$Mn$_x$O$_3$ single crystals, a new low-temperature magnetic phase CxGyFz (for the space group of Pnma) was discovered, characterized by the direction of a weak ferromagnetic moment along the c axis of the crystal, which had not been previously observed. Thus, as the temperature decreases for concentrations $x$ = 0.05 and 0.1, a more complex transition of the spin reorientation AxFyGz $\to$ GxCyAz $\to$ CxGyFz in HoFe$_{1-x}$Mn$_x$O$_3$ is observed, in contrast to the transition AxFyGz $\to$ GxCyAz realized in single crystals HoFe$_{1-x}$Mn$_x$O$_3$ with $x>$ 0.1.
Keywords:orthoferrites, spin reorientation transition, magnetic phase diagram.
Fulltext:
PDF file (796 kB)