Effect of Stress on Magnetization. 



Tungsten- Steel. 

 T=3371 gr./mm. 2 ; f==13°-7 C. 



79 



7 = 



-.0. 



t-=69'-2. 



H. 



I. 



H. 



I. 



2-71 



16-7 



222 



13-4 



4-68 



31-7 



4-61 



298 



7-98 



60-5 



10-56 



87-0 



1203 



109-0 



14-72 



153-2 



16-80 



222-6 



16-80 



209-8 



19-03 



364-2 



18-98 



359-2 



22-04 



630 



21-97 



622 



27-63 



844 



27-45 



840 



34-18 



958 



33-87 



958 



50-26 



10S3 



42-41 



1038 



859 



1185 



63-2 



1136 



132-2 



1247 



105-6 



1223 



179-8 



1272 



158-4 



1279 



210-5 



1307 



212-4 



1318 



267-7 



1334 



2691 



1341 



344-1 



1359 



343 8 



1366 



From the results thus far described, it may be concluded 

 that in Swedish iron and tungsten-steel, the final magnet- 

 ization is affected in no inconsiderable degree by the order 

 of magnetizing and straining. This fact stands parallel to 

 the result of our previous experiment that in these metals, 

 the change of elastic constants bv magnetization is considerably 

 affected by the order of applying the stress and the 

 magnetizing field. 



II. Nickel. 



The effect of stress on the magnetization of nickel has 

 been thoroughly studied by several physicists, so that there 

 remains little to be studied about the effect. Our present 

 investigation has, however, this characteristic, that several 

 effects of stress on magnetization were studied with the same 

 specimen over a wide range of the magnetizing field and 

 with special attention to the hysteresis effect. 



(a) Change of Magnetization by Tension under Constant 

 " Field: (SI,T) H . 



The initial effect of loading on magnetization in very weak 

 fields is an increase of magnetization by low tension, and a 

 decrease by high tension ; but the cyclic effect is always a 

 decrease, unlike the Yillari reversal in iron. Above 2 C.G.s. 



