DEVELOPMENTS IN COMMUNICATION MATERIALS 255 



3600r 



3200 



2600 



2400- 



2000- 



:i. 



1600- 



1200- 



800- 



400 



1300 



Fig. 19 — Permeability curves for perminvar. 



1200 



1000 



800 



CD 600 



400 



200 

 



1200 



1000 



800 



OQ600 



400 



200 

 



Ofl 1.6 2.4 32 



H 



6000 



5000 



4000 



3000 



2000 



1000 



(0 



-1000 



-2000 



-3000 



-4000 



-5000 



-6000 

 0.8 1.6 2.4 3.2 -5-4-3-2-1 I 2 3 4 5 



H H 



Fig. 20 — Hysteresis loops for perminvar. 

 A — Air quenched. 

 5— Baked. 



