Accession Number : AD0637268

Title :   RESEARCH IN FERROMAGNETICS.

Descriptive Note : Final rept. 16 May 64-15 Mar 65.

Corporate Author : LFE ELECTRONICS BOSTON MASS SOLID STATE ELECTRONICS LAB

Personal Author(s) : Spain,Robert J. ; Jauvtis,Harvey I. ; Peoples,Patrick J. ; Webber,Ronald J.

Report Date : APR 1965

Pagination or Media Count : 246

Abstract : A new thin film technique is described which has implications for use in a network of all-magnetic logic of a most complete and general character. The technique, called Domain Tip Propagation Logic (DTPL), makes use of the controlled growth of domains which are confined to a pattern of narrow, low coercive force channels imbedded in a film element of generally high coercive force. Information is stored within regions of the low coercive force channels in the form of domains of reversed magnetization and propagated through the channels under the influence of an applied field by expansion of the domains at the domain tips. In this manner it is possible to control the direction of domain tip propagation and the mutual interaction between domain tips within channels brought into proximity of each other. The dependence of the direction of domain tip propagation upon the magnitude and direction of the applied field, the magnetostatic forces between neighboring domain tips and the speed of domain tip propagation are such as to allow the construction of a wide variety of magnetic thin film devices. (Author)

Descriptors :   (*COMPUTER LOGIC, *FILMS), (*FERROMAGNETIC MATERIALS, FILMS), FERROMAGNETISM, MANUFACTURING, PROPAGATION, MAGNETIC PROPERTIES

Subject Categories : Electricity and Magnetism
      Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE