THE INFLUENCE OF SN ALLOYING ON THE MAGNETIC TRANSFORMATION IN NI2CU

For Ni-Cu-Sn alloys with Ni-to-Cu ratios near 2 to 1, the effect of Sn content and of heat treatment on the ferromagnetic <-> paramagnetic t ransformation was investigated by dynamic resistance measurements, Spe cimens with Sn contents near 0, 3, and 7 at, % were measured through t he temperature range -180 to 900 degrees C. The magnetic transformatio n temperature decreases linearly with increasing Sn content; in the ca se of a chill-solidified sample with Sn content similar to 3 at. %, th is temperature decrease is independent of the maximum temperature atta ined during heat-treatment cycles for T-max less than or equal to 700 degrees C.