Abstract
The reorientation temperature and magnetocrystalline anisotropy field (H/sub a/) of Nd/sub 2/(Fe/sub 1-x/Co/sub x/)/sub 14/B/sub 1-y/C/sub y/ in the temperature range 200-450 K were determined by AC initial susceptibility measurements and the singular point detection technique, respectively. The temperature dependence of saturation magnetization was measured on finely powdered polycrystalline samples in an extraction magnetometer in fields up to 80 kOe. It was found that the Nd/sub 2/(Fe/sub 1-x/Co/sub x/)/sub 14/C (X<or=0.4) series consisted of a mixture of two phases, Nd/sub 2/(Fe,Co)/sub 17/C/sub x/ and alpha -(Fe,Co), irrespective of heat treatment schedules. Partial substitution of C for boron led to a slight increase of H/sub a/, whereas substitution of Co for Fe (at low Co concentration) causes an increase of H/sub a/ at low temperature. Although the concentration dependence of M/sub s/ is reminiscent of the Slater-Pauling curve, no maximum was found at either 1.5 K or 300 K, as one would expect in Fe-Co and Nd/sub 2/(Fe,Co)/sub 14/B alloys.<<ETX>>
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