Patent ID: 11942129
Assignee: BOARD OF REGENTS, THE UNIVERSITY OF TEXAS SYSTEM
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 8:
9. A memory device, comprising:
a magnetic tunnel junction, comprising:
a fixed ferromagnet with a fixed magnetization;
a free ferromagnet with a bistable magnetization, wherein the bistable magnetization of the free ferromagnet is in one of two states comprising: a parallel state wherein the bistable magnetization is approximately parallel to the fixed magnetization of the fixed ferromagnet and an anti-parallel state wherein the bistable magnetization is approximately anti-parallel to the fixed magnetization of the fixed ferromagnet;
an insulating tunnel barrier between the fixed ferromagnet and free ferromagnet;
a heavy metal layer adjacent the free ferromagnet;

a first write terminal connected to the heavy metal layer;
a second write terminal connected to the heavy metal layer; and
a read terminal connected to the fixed ferromagnet;
wherein the magnetic tunnel junction comprises perpendicular magnetic anisotropy (PMA) along an axis normal to an interface between the free ferromagnet and the insulating tunnel barrier; and
wherein the heavy metal layer is configured to receive unidirectional electric current therethrough from the first write terminal to second write terminal and substantially normal to the PMA, wherein the unidirectional electrical current pulse applied through the heavy metal layer toggles the bistable magnetization of the free ferromagnet layer between the parallel and anti-parallel states regardless of which state the free ferromagnet layer is in upon application of the unidirectional electric current pulse.