Non-destructive read-out memory wire

Claim 1

A magnetic wire memory element for non-destructive information read-out which comprises in combination, a word wire, said word wire having a wire core of non-magnetic conductive material, a first layer of a soft ferromagnetic anisotropic magnetic material deposited on said core and having a low coercive field strength in the easy magnetic axis and parallel to said core, said first layer composed of a member selected from the group consisting of a composition of iron and nickel and said composition with a small percentage of cobalt added, a second non-magnetic layer deposited on said first layer, a third layer of hard anisotropic magnetic material deposited on said second layer and having a high coercive field strength in the easy magentic axis and parallel to said core, said third layer composed of a member selected from the group consisting of nickel-iron-cobalt alloy, cobalt-iron alloy, nickel-cobalt alloy and cobalt; and a digit wire wound around said word wire; means for write-in by successive transmission of a current pulse through the word wire and a current pulse through the digit wire thereby effecting direction of magnetization in the first and third layers parallel to said core; and current means for nondestructive read-out, said current means creating a magnetizing flux through said third layer parallel to said core about said digit wire and closed external of said word wire whereby after effecting read-out, magnetizing flux returns to the direction of magnetization effected by write-in in the first and third layers parallel to said core.