Magnetic aftereffect of Nd-Fe-B sintered magnets

The magnetic field and temperature dependences of the magnetic aftereffect constant S/sub v/ were measured for Nd-Fe-B sintered magnets in the temperature range between 200 and 500 K on a J-H demagnetizing curve. It was found that S/sub v/ is constant and independent of the magnetic field in the ran...

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Veröffentlicht in:IEEE Trans. Magn.; (United States) 1988-11, Vol.24 (6), p.3188-3192
1. Verfasser: Nishio, H.
Format: Artikel
Sprache:eng
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Zusammenfassung:The magnetic field and temperature dependences of the magnetic aftereffect constant S/sub v/ were measured for Nd-Fe-B sintered magnets in the temperature range between 200 and 500 K on a J-H demagnetizing curve. It was found that S/sub v/ is constant and independent of the magnetic field in the range from H/sub m/ to H/sub cJ/. S/sub v/ decreases linearly between 200 and 500 K as the temperature increases and is larger in materials whose H/sub cJ/ is large. The temperature dependence of S/sub v/ for Nd-Dy-Fe-B and Nd-Fe-Co-B sintered magnets differs from that in SmCo/sub 5/ magnets and is similar to that in Sm/sub 2/Co/sub 17/ sintered magnet. However, the value of S/sub v/ for Nd-Fe-Co-B sintered magnet is larger than that of Sm/sub 2/Co/sub 17/ magnets by roughly 2.5 to 3 times.< >
ISSN:0018-9464
1941-0069
DOI:10.1109/20.92376