Magnetic Domain Structure of Cobalt and Iron Borides

Resumo

The method of slow cooling from melting temperature is used to obtain coarse-grain ingots of (Fe_xCo_{1 – x})₂B with columnar structure. It is shown that at room temperature the configuration of the domain structure of the specimens of (Fe_xCo_{1 – x})₂B corresponds to magnetocrystalline anisotropy (MCA) of different types. Alloys Fe₂B, (Fe_0.4Co_0.6)₂B, (Fe_0.2Co_0.8)₂B and Co₂B exhibit MCA of the type of a “plane of easy axes.” Alloy (Fe_0.92Co_0.08)₂B has a state with spin-reorientation transition of type “easy axis” – “plane of easy axes”.