Patent ID: 7876595

Claim:
A shift register comprising: a track comprising a ferromagnetic material and having a switchable magnetization orientation, the track having a first end and a second end; a first electrode at the first end and a second electrode at the second end to supply a first current to the track in a first direction and to supply a second current in a second direction, the second direction being opposite to the first direction; a first domain wall anchor to stabilize a domain wall positioned proximate the track between the first electrode and the second electrode, the first domain wall anchor comprising a first ferromagnetic pinned layer, a first barrier layer proximate the track, and a first remote magnet electrically spaced from the track, the first barrier layer positioned between the track and the first ferromagnetic pinned layer, the first ferromagnetic layer having a magnetization orientation pinned perpendicular to the magnetization orientation of the track, and the first remote magnet having a magnetization orientation pinned perpendicular to the magnetization orientation of the track; and a second domain wall anchor to stabilize a domain wall positioned proximate the track between the first domain wall anchor and the second electrode, the second domain wall anchor comprising a second ferromagnetic pinned layer, a second barrier layer proximate the track, and a second remote magnet electrically spaced from the track, the second barrier layer positioned between the track and the second ferromagnetic pinned layer, the second ferromagnetic layer having a magnetization orientation pinned perpendicular to the magnetization orientation of the track, and the second remote magnet having a magnetization orientation pinned perpendicular to the magnetization orientation of the track.