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Magnetic properties of Ga-added die-upset Nd-Fe-B magnets

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4 Author(s)
Endoh, M. ; Hitachi Metals Ltd., Saitama, Japan ; Tokunaga, M. ; Boltich, E.B. ; Wallace, W.E.

The magnetic properties of Ga-added die-upset Nd-Fe-B magnets have been measured between 4.2 and 473 K. The die-upset magnets show a larger stepwise decrease in the demagnetization curve then a sintered magnet below the spin reorientation temperature because of the low alignment of grains in the die-upset magnets. In the temperatures range above room temperature, the high-coercivity Ga-added die-upset magnet has excellent properties compared with the Ga-free die-upset magnet. The addition of Ga increases the pinning force, resulting in the increase of i Hc

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Magnetics, IEEE Transactions on  (Volume:25 ,  Issue: 5 )