THE TWISTOR 



1333 



ing curves for these samples as well as for a number of solid magnetic 

 wires are shown in Fig. 9. The agreement between the measured values 

 of s,„ and the calculated values [(14) and (25)] is ciuite good. Improved 

 composite wire samples are under development. 



IV. EXPERIMENTAL MEMORY CELLS AND ARRAYS 



The initial experiments were performed using commerciall}^ a\'ailable 

 nickel wire of 3-mil diameter. The ^p-'Nl characteristic of this wire in the 

 helical direction is extremely square. This is a feature of all the magnetic 

 materials tested whether annealed or unannealed. As a typical example, 



APPLIED 



TWIST 



IN 



RADIANS 



PER CM 



1.5 



1.0 



0.5 



-0.5 



-1.0 



PULSE 

 RESPONSE 



9S-NI, 60 CYCLE 

 AXIAL CIRCULAR 



■aniSBBBBBV mmmmmmmm ■■■■■■rfi 



^■■■■■■■■B ■■■■■■!■■ ■■■■■■■■ 



■■■■■■■■■■ aiiaBBBB! BtaBfiH^Ba 



BBBBBBBBBS ibbbbbbb ■■■■■■■■ 



■■■■■■■■■■ BBBBBBB^ BBBBBBBB 



SSBBBBBBBS ■■■■■■■■ ■■■■■■■■ 



BBBSSBB9BB BBBHBBHI ■■■■■BBB 

 ■■■■■■■■■■ BBBBBBBI BBBBBBBB 



■itomm Bsaus; bibb:: 



BBUBBliBB lESSSai 



■■e--=:: 



■^^■■■■■■B ■ ■■■■ 



Fig. 11 — Sixty cycle and switching waveforms for 83 Ni, 17 Fe wire (see Fig. 9) 

 as a function of applied torsion. 



