Abstract
The comparison of spontaneous magnetization losses in sintered magnets (Pr0.51Dy0.49)13(Fe0.64Co0.36)80B7 and (Pr0.51Dy0.49)13(Fe0.64Co0.36)79Cu1B % at. has shown that copper doping leads to a reduction in these losses. This is due both to phase homogenization, which reduces the scattering fields at the phase boundaries, and to the growth of the average anisotropy field and the coercive force, which stabilizes the time characteristics of the magnet. It is found that at room temperature the demagnetization dynamics is described by an exponential function.
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