Spin-transfer torque switched magnetic tunnel junction for memory technologies

JZ Sun - Journal of Magnetism and Magnetic Materials, 2022 - Elsevier
A spin-transfer torque switched magnetic tunnel junction (MTJ) is a memory element in
modern magnetic random access memory (MRAM), a CMOS-integrated technology that is …

Thermally activated switching of perpendicular magnet by spin-orbit spin torque

KS Lee, SW Lee, BC Min, KJ Lee - Applied Physics Letters, 2014 - pubs.aip.org
We theoretically investigate the threshold current for thermally activated switching of a
perpendicular magnet by spin-orbit spin torque. Based on the Fokker-Planck equation, we …

Emerging three-terminal magnetic memory devices

SW Lee, KJ Lee - Proceedings of the IEEE, 2016 - ieeexplore.ieee.org
Spin-transfer torques can switch magnetizations via a current passing through a magnetic
tunnel junction, an effect that is being pursued as the switching mechanism in spin-transfer …

Applications of nanomagnets as dynamical systems: I

B Rana, AK Mondal, S Bandyopadhyay… - …, 2021 - iopscience.iop.org
When magnets are fashioned into nanoscale elements, they exhibit a wide variety of
phenomena replete with rich physics and the lure of tantalizing applications. In this topical …

Local bifurcation with spin-transfer torque in superparamagnetic tunnel junctions

T Funatsu, S Kanai, J Ieda, S Fukami, H Ohno - Nature communications, 2022 - nature.com
Modulation of the energy landscape by external perturbations governs various thermally-
activated phenomena, described by the Arrhenius law. Thermal fluctuation of nanoscale …

Dynamics of spin torque switching in all-perpendicular spin valve nanopillars

H Liu, D Bedau, JZ Sun, S Mangin, EE Fullerton… - Journal of Magnetism …, 2014 - Elsevier
We present a systematic experimental study of the spin-torque-induced magnetic switching
statistics at room temperature, using all-perpendicularly magnetized spin-valves as a model …

Sigmoidal curves of stochastic magnetic tunnel junctions with perpendicular easy axis

K Kobayashi, WA Borders, S Kanai… - Applied Physics …, 2021 - pubs.aip.org
We investigate the physical mechanism governing the sigmoid-like time-averaged response
of stochastic magnetic tunnel junctions (s-MTJ), which is a promising building block for …

Exploring spin polarization of heavy quarks in magnetic fields and hot medium

Z Liu, Y Bai, S Zheng, A Huang, B Chen - Physical Review C, 2024 - APS
Relativistic heavy-ion collisions give rise to the formation of both deconfined quantum
chromodynamics (QCD) matter and a strong magnetic field. The spin of heavy quarks is …

Magnetization switching probability in the dynamical switching regime driven by spin-transfer torque

T Taniguchi, S Isogami, Y Shiokawa, Y Ishitani… - Physical Review B, 2022 - APS
We study magnetization switching in the dynamical regime for in-plane magnetized systems,
useful for field-free spin-orbit torque switching devices. We derive a formula for the switching …

Metrology and metrics for spin-transfer-torque switched magnetic tunnel junctions in memory applications

JZ Sun, C Safranski - Journal of Magnetism and Magnetic Materials, 2022 - Elsevier
A spin-transfer torque (STT) switched magnetic tunnel junction (MTJ) enables modern
magnetic random access memory (MRAM). Optimization of perpendicularly magnetized MTJ …