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Magnetization reversal of Nd-Fe-B sintered magnets at low temperatures |
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| Authors: | NV Baranov EV Sinitsyn EA Ignatyev SV Andreev |
| Institution: | a Institute of Physics and Applied Mathematics, Ural State University, 620083, Ekaterinburg, Russia b Ural Polytechnic Institute, 620002, Ekaterinburg, Russia |
| Abstract: | Barkhausen-like magnetization jumps at temperatures T < 9.5 K and the behaviour of the coercive field at low temperatures are studied in sintered Nd-Fe-B magnets with different chemical and phase compositions. The nonlinear temperature dependence of the coercive field Hc is well described in the thermal activation model at T > 10 K. The low temperature anomalies of Hc are discussed in terms of the quantum tunneling of the domain wall through the intergrain boundaries. |
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