Cryogenic behavior of selected magnetic materials

Abstract

Measurements of a-c core loss and d-c magnetic properties including coercive force, residual induction, and hysteresis loss are reported at temperatures of 273, 195, 76, and 4 °K for a variety of commercial magnetic Fe-Si and Fe-48 percent Ni alloys. Of the materials tested the high silicon content (3 to 4.45 percent Si) Fe-Si alloys were found to be the least temperature sensitive. Hysteresis loss increases between 273 and 4 °K of up to 100 percent were measured for the iron-nickel materials.