BaFe10.5Mn1.5O19 single crystal growth
Abstract
This paper presents the results of single crystal growth and research of the crystal structure of magnetic properties of manganese substituted barium hexaferrite BaFe12–xMnxO19 single crystals. Single crystals were grown from Na2O using the method of spontaneous crystallization. Crystals of BaFe12–xMnxO19 with x up to 1.5 and sizes up to 8 mm were obtained. The influence of Fe substitution by Mn on magnetic properties was investigated.
The grown crystals were tested with SEM/EDX. An X-ray analysis of the samples was performed, and lattice parameters were obtained. For the composition BaFe10.5Mn1.5O19 lattice parameters were equal to a = 5.8946(2) Å, c = 23.1870(6) Å, V = 697.73(3) Å3.
The differential scanning calorimeter was used to obtain the temperature of phase transformation. For x = 1.5 the Curie temperature decreased from 455 to 380 °C.
For BaFe10.5Mn1.5O19 magnetic properties were measured. For single crystal samples saturation magnetization reduced from 269 to 237.3 kA/m, and the coercive force was 1 Oe at room temperature.
