摘要:
MTJ material stacks, pSTTM devices employing such stacks, and computing platforms employing such pSTTM devices. In some embodiments, perpendicular MTJ material stacks include one or more electrode interface material layers disposed between a an electrode metal, such as TiN, and a seed layer of an antiferromagnetic layer or synthetic antiferromagnetic (SAF) stack. The electrode interface material layers may include either or both of a Ta material layer or CoFeB material layer. In some Ta embodiments, a Ru material layer may be deposited on a TiN electrode surface, followed by the Ta material layer. In some CoFeB embodiments, a CoFeB material layer may be deposited directly on a TiN electrode surface, or a Ta material layer may be deposited on the TiN electrode surface, followed by the CoFeB material layer.
摘要:
The present disclosure concerns a magnetoresistive element (1) comprising: a storage layer (21) having a first storage magnetostriction; a sense layer (23) having a first sense magnetostriction; a barrier layer (22) between and in contact with the storage and sense layer (21, 23); wherein the magnetoresistive element (1) further comprises a compensating ferromagnetic layer (25) having a second magnetostriction different from the first storage magnetostriction and/or sense magnetostriction, and adapted to compensate the first storage magnetostriction and/or the first sense magnetostriction so that a net magnetostriction of the storage layer (21) and/or sense layer (23) is adjustable between -10 ppm et +10 ppm or more negative than -10 ppm by adjusting a thickness of the compensating ferromagnetic layer (25). The present disclosure concerns also concerns a magnetic device comprising the magnetoresistive element.
摘要:
Provided is a magnetic element capable of generating one skyrmion and erasing the one skyrmion. The magnetic element includes a magnet shaped like a substantially rectangular flat plate, an upstream electrode connected to the magnet in a width Wm direction of the magnet and made of a non-magnetic metal, a downstream electrode connected to the magnet in the width Wm direction to oppose the upstream electrode and made of a non-magnetic metal, and a skyrmion sensor configured to detect the skyrmion. Here, a width Wm of the substantially rectangular magnet is such that 3·λ > Wm ≥ λ, where λ denotes a diameter of the skyrmion, a length Hm of the substantially rectangular magnet is such that 2·λ > Hm ≥ λ, and the magnet has a notch structure at an edge between the upstream electrode and the downstream electrode.
摘要:
A self-referenced MRAM cell (1) comprises a first portion (2') of a magnetic tunnel junction (2) including a storage layer (23); a second portion (2") of the magnetic tunnel junction portion (2) including a tunnel barrier layer (22), a sense layer (21) and a seed layer (25); the seed layer (25) comprising a material having high spin-orbit coupling such that passing a sense current (32) along the plane of the sense layer (21) and/or seed layer (25) exerts a spin-orbit torque adapted for switching a sense magnetization (210) of the sense layer. A memory device comprising a plurality of the MRAM cells and a method for operating the memory device are also disclosed.
摘要:
The present disclosure concerns a magnetic sensor device (100) for sensing an external magnetic field, comprising a plurality of MLU cells (1), each MLU cell (1) comprising a magnetic tunnel junction (2) including a sense layer (21) having a sense magnetization (210) freely orientable in the external magnetic field; a storage layer (23) having a storage magnetization (230); and a tunnel barrier layer (22) between the sense layer (21) and the storage layer (23); the magnetic sensor device (100) further comprising a stress inducing device (6) configured for applying an anisotropic mechanical stress on the magnetic tunnel junction (2) such as to induce a stress-induced magnetic anisotropy (271, 272) on at least one of the sense layer (21) and the storage layer (23); and the stress-induced magnetic anisotropy (271, 272) induced by the stress inducing device corresponding substantially to a net magnetic anisotropy (280) of said at least one of the sense layer (21) and the storage layer (23). The magnetic sensor device can be programmed easily and has improved sensitivity.