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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2308.13408 |
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| _version_ | 1866929534554603520 |
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| author | Zhao, Bing Bainsla, Lakhan Ershadrad, Soheil Zeng, Lunjie Ngaloy, Roselle Svedlindh, Peter Olsson, Eva Sanyal, Biplab Dash, Saroj P. |
| author_facet | Zhao, Bing Bainsla, Lakhan Ershadrad, Soheil Zeng, Lunjie Ngaloy, Roselle Svedlindh, Peter Olsson, Eva Sanyal, Biplab Dash, Saroj P. |
| contents | The discovery of van der Waals (vdW) magnetic materials exhibiting non-trivial and tunable magnetic interactions can give rise to exotic magnetic states, which are not readily attainable with conventional materials. Such vdW magnets can provide a unique platform for studying new magnetic phenomena and realizing magnetization dynamics for energy-efficient and non-volatile spintronic memory and computing technologies. Here, we discover the coexistence of ferromagnetic and antiferromagnetic orders in vdW magnet (Co0.5Fe0.5)5-xGeTe2 (CFGT) CFGT above room temperature, inducing an intrinsic exchange bias and canted perpendicular magnetism. Such non-trivial intrinsic magnetic order enables us to realize energy-efficient, magnetic field-free, and deterministic spin-orbit torque (SOT) switching of CFGT in heterostructure with Pt. The devices show a very large spin Hall conductivity, a low critical current density, and yield a large SOT effective field. These experiments, together with density functional theory and Monte Carlo simulations establish coexisting non-trivial magnetic orders in CFGT that enable field-free SOT magnetization dynamics in spintronic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_13408 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Coexistence of non-trivial van der Waals magnetic orders enable field-free spin-orbit torque switching at room temperature Zhao, Bing Bainsla, Lakhan Ershadrad, Soheil Zeng, Lunjie Ngaloy, Roselle Svedlindh, Peter Olsson, Eva Sanyal, Biplab Dash, Saroj P. Mesoscale and Nanoscale Physics The discovery of van der Waals (vdW) magnetic materials exhibiting non-trivial and tunable magnetic interactions can give rise to exotic magnetic states, which are not readily attainable with conventional materials. Such vdW magnets can provide a unique platform for studying new magnetic phenomena and realizing magnetization dynamics for energy-efficient and non-volatile spintronic memory and computing technologies. Here, we discover the coexistence of ferromagnetic and antiferromagnetic orders in vdW magnet (Co0.5Fe0.5)5-xGeTe2 (CFGT) CFGT above room temperature, inducing an intrinsic exchange bias and canted perpendicular magnetism. Such non-trivial intrinsic magnetic order enables us to realize energy-efficient, magnetic field-free, and deterministic spin-orbit torque (SOT) switching of CFGT in heterostructure with Pt. The devices show a very large spin Hall conductivity, a low critical current density, and yield a large SOT effective field. These experiments, together with density functional theory and Monte Carlo simulations establish coexisting non-trivial magnetic orders in CFGT that enable field-free SOT magnetization dynamics in spintronic devices. |
| title | Coexistence of non-trivial van der Waals magnetic orders enable field-free spin-orbit torque switching at room temperature |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2308.13408 |