The research value of magnetic losses in the magnetic reversal frequency magnetically bonded magnets and electrical steel industry produces. Samples of bonded magnets produced by pressing with the addition of 1.5-2.0% polymeric ligaments. As the samples of electrical steel were used commercially available steels with a sheet’s thickness from 0.18 to 0.35mm. To measure the static magnetic hysteresis loops was used vibrating magnetometer. To study the processes of magnetization reversal and measurement of magnetic losses in magnetic materials had been developed and created the installation, which allowed measuring these characteristics in a closed magnetic circuit. It was found that losses in the bonded magnets with increasing frequency of magnetic reversal due to Fourier currents are significantly lower than in electrical steels. This advantage makes bonded magnets competitive in a number of technical applications.
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
Department of Department of General Physics and Physics of Condensed State, Faculty of Physics, M.V.Lomonosov Moscow State University, Moscow 119991, Russia
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