130 



BELL SYSTEM TECHNICAL JOURNAL 



5000 



2000 



If) 



Uj 1000 



-0.4 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 



-0.4 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2 3.6 



600 



1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 



MAGNETIZING FORCE (H) IN OERSTEDS 



Fig. 10 — Hysteresis loops and permeability curves for 45-25 perminvar. 



