Spin-orbit torque device array and method of manufacturing spin-orbit torque device array
AssigneesHyundai Motor Company, Kia Corporation, Korea Advanced Institute of Science and Technology
InventorsJi-Sung Lee, Joon-Hyun Kwon, Su-Jung Noh, Han-Saem Lee, Dae-Kyu Koh, Byong-Guk Park, Jaimin Kang, Soogil Lee
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Abstract
An embodiment spin-orbit torque device array includes a plurality of single devices, each device including a non-magnetic layer, a magnetic layer bonded to the non-magnetic layer, and an upper layer bonded to the magnetic layer, wherein the upper layer includes oxide, and wherein a magnetization state of each of the single devices has only two states, the two states being an up state and a down state.
Claims16
A method of manufacturing a spin-orbit torque device array, the method comprising:
- acquiring a switching curve according to an applied current of the spin-orbit torque device array comprising a plurality of single devices, wherein each of the single devices comprises a non-magnetic layer, a magnetic layer bonded to the non-magnetic layer, and an upper layer bonded to the magnetic layer, and wherein the upper layer comprises oxide;
- setting a pulse current for acquiring a security device pattern from a distribution of magnitudes of switching currents of the single devices based on the switching curve;
- setting saturation currents from spin-orbit torque (SOT) switching curves acquired by applying the pulse current to the single devices;
- and
- saturating magnetization states of the single devices by applying the saturation currents to the single devices.
A method of manufacturing a spin-orbit torque device array, the method comprising:
- providing a plurality of single devices, wherein each of the single devices comprises a non-magnetic layer comprising Pt (platinum) or Ta (tantalum), a magnetic layer comprising CoFeB, CoFe, NiFe alloy, or Co bonded to the non-magnetic layer, and an upper layer comprising oxide bonded to the magnetic layer;
- acquiring a switching curve according to an applied current of the spin-orbit torque device array;
- setting a pulse current for acquiring a security device pattern from a distribution of magnitudes of switching currents of the single devices based on the switching curve;
- setting saturation currents from spin-orbit torque (SOT) switching curves acquired by applying the pulse current to the single devices;
- and
- saturating magnetization states of the single devices by applying the saturation currents to the single devices.
Dependencies are inferred from the claim text.