Perpendicular STTM multi-layer insert free layer

    公开(公告)号:US11295884B2

    公开(公告)日:2022-04-05

    申请号:US16329309

    申请日:2016-09-30

    Abstract: A perpendicular spin transfer torque memory (pSTTM) device incorporates a magnetic tunnel junction (MTJ) device having a free magnetic stack that includes a plurality of magnetic layers interleaved with a plurality of non-magnetic insert layers. The layers are arranged such that the topmost and bottommost layers are magnetic layers. The stacked design decreases the damping of the MTJ free magnetic stack, beneficially reducing the write current required to write to the pSTTM device. The stacked design further increases the interface anisotropy, thereby beneficially improving the stability of the pSTTM device. The non-magnetic interface layer may include tantalum, molybdenum, tungsten, hafnium, or iridium, or a binary alloy containing at least two of tantalum, molybdenum, tungsten hafnium, or iridium.

    Magnetic diffusion barriers and filter in PSTTM MTJ construction

    公开(公告)号:US10403811B2

    公开(公告)日:2019-09-03

    申请号:US15503680

    申请日:2014-09-26

    Abstract: A material layer stack for a magnetic tunneling junction, the material layer stack including a fixed magnetic layer; a dielectric layer; a free magnetic layer; and an amorphous electrically-conductive seed layer, wherein the fixed magnetic layer is disposed between the dielectric layer and the seed layer. A non-volatile memory device including a material stack including an amorphous electrically-conductive seed layer; and a fixed magnetic layer juxtaposed and in contact with the seed layer. A method including forming an amorphous seed layer on a first electrode of a memory device; forming a material layer stack on the amorphous seed layer, the material stack including a dielectric layer disposed between a fixed magnetic layer and a free magnetic layer, wherein the fixed magnetic layer.

    Fabrication of crystalline magnetic films for PSTTM applications

    公开(公告)号:US10388858B2

    公开(公告)日:2019-08-20

    申请号:US15503357

    申请日:2014-09-26

    Abstract: A method including forming a device stack including a dielectric layer between a fixed magnetic layer and a free magnetic layer on a fully-crystalline sacrificial film or substrate including a crystal lattice similar to the crystal lattice of the dielectric material; and transferring the device stack from the sacrificial film to a device substrate. An apparatus including a device stack including a dielectric layer between a fixed magnetic layer and a free magnetic layer on a device substrate wherein the fixed magnetic layer and the free magnetic layer each have a crystalline lattice conforming to a crystalline lattice of the sacrificial film or substrate on which they were formed prior to transfer to the device substrate.

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