Title :
Investigation of the thermal remagnetization in sintered hard magnets
Author :
Jahn, Ludwig ; Schumann, Rolf ; Ivanov, Vladimir
Author_Institution :
Inst. of Appl. Phys., Tech. Univ. Dresden, Germany
fDate :
7/1/2001 12:00:00 AM
Abstract :
The maximum thermal remagnetization (TR) after dc-demagnetization was studied at sintered RE/T hard magnets and at barium ferrite. We found very large TR-effects for SmCo5, large effects for hard ferrites, medium for NdFeB and a very low effect for Sm2Co 17 magnets. The experimental results are interpreted on the basis of a theory taking into account the local fluctuations of the internal magnetic field as well as the internal demagnetization effects. The relevant model parameters were estimated for SmCo5 and barium ferrite
Keywords :
demagnetisation; magnetisation; permanent magnets; sintering; BaFe12O19; DC demagnetization; NdFeB; Sm2Co17; SmCo5; barium ferrite; internal magnetic field fluctuations; rare earth-transition metal alloy; sintered hard magnet; thermal remagnetization; Barium; Coercive force; Cooling; Demagnetization; Ferrites; Heating; Magnets; Physics; Polarization; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
