| In the present work a study of the influence of structural state on magnetic hysteresis properties of Y2(Fe1-xCox)14B compounds was carried out. Starting alloys were prepared by induction melting in an Ar atmosphere. Y-Fe-Co-B alloys with a nanograin structure were obtained by various techniques such as a severe plastic deformation (SPD) and by the classical melt spinning. Electron microscopy and X-ray analysis were used for the structural investigation. The magnetization measurements were performed using a SQUID magnetometer. It is shown that the relatively high values of coercive force are observed in such weakly-anisotropic alloys as Y2(Fe1-xCox)14B in case of achieved nanograin structure. The effect of remanence enhancement over than 0.5 is observed in rapidly quenched Y2Fe14B alloys at T = 4.2K. The influence of hydrogen on magnetic hysteresis properties is studied as well. |
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