Spin-orbit torque efficiency in Ta or W/Ta-W/CoFeB junctions
Efforts to improve the spin–orbit torque efficiencies in junctions consisting of nonmagnetic and ferromagnetic layers are current technological interest to construct magnetic memory and logic devices. However, most of the previous studies have relied on pure metallic elements, and thus, the outcomes...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | Materials Research Express |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/2053-1591/ac2c30 |
| _version_ | 1797746732181749760 |
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| author | In Ho Cha Min Hyeok Lee Gyu Won Kim Taehyun Kim Young Keun Kim |
| author_facet | In Ho Cha Min Hyeok Lee Gyu Won Kim Taehyun Kim Young Keun Kim |
| author_sort | In Ho Cha |
| collection | DOAJ |
| description | Efforts to improve the spin–orbit torque efficiencies in junctions consisting of nonmagnetic and ferromagnetic layers are current technological interest to construct magnetic memory and logic devices. However, most of the previous studies have relied on pure metallic elements, and thus, the outcomes were marginal. Here, we investigate the spin–orbit torque efficiencies of junctions consisting of Ta-W and CoFeB with Ta and W underlayers, focusing on the thickness and concentration of Ta-W alloy. The damping-like torque change is more significant with the W underlayer than with the Ta underlayer. We found an enhancement in damping-like torque value reaching −23% measured for a sample consisting of 4 nm thick β -phase Ta _15 W _85 at% layer. This value is substantially more significant than that of the junction with β -W only (−17%). |
| first_indexed | 2024-03-12T15:42:00Z |
| format | Article |
| id | doaj.art-496da76a7f184c68b4656232dfd24641 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:42:00Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-496da76a7f184c68b4656232dfd246412023-08-09T15:56:15ZengIOP PublishingMaterials Research Express2053-15912021-01-0181010610210.1088/2053-1591/ac2c30Spin-orbit torque efficiency in Ta or W/Ta-W/CoFeB junctionsIn Ho Cha0https://orcid.org/0000-0003-1832-4671Min Hyeok Lee1Gyu Won Kim2Taehyun Kim3Young Keun Kim4https://orcid.org/0000-0002-0868-4625Department of Materials Science and Engineering, Korea University , Seoul 02841, Republic of KoreaDepartment of Materials Science and Engineering, Korea University , Seoul 02841, Republic of KoreaDepartment of Materials Science and Engineering, Korea University , Seoul 02841, Republic of KoreaDepartment of Materials Science and Engineering, Korea University , Seoul 02841, Republic of KoreaDepartment of Materials Science and Engineering, Korea University , Seoul 02841, Republic of KoreaEfforts to improve the spin–orbit torque efficiencies in junctions consisting of nonmagnetic and ferromagnetic layers are current technological interest to construct magnetic memory and logic devices. However, most of the previous studies have relied on pure metallic elements, and thus, the outcomes were marginal. Here, we investigate the spin–orbit torque efficiencies of junctions consisting of Ta-W and CoFeB with Ta and W underlayers, focusing on the thickness and concentration of Ta-W alloy. The damping-like torque change is more significant with the W underlayer than with the Ta underlayer. We found an enhancement in damping-like torque value reaching −23% measured for a sample consisting of 4 nm thick β -phase Ta _15 W _85 at% layer. This value is substantially more significant than that of the junction with β -W only (−17%).https://doi.org/10.1088/2053-1591/ac2c30spin-orbit torqueTa-W alloycrystal phase |
| spellingShingle | In Ho Cha Min Hyeok Lee Gyu Won Kim Taehyun Kim Young Keun Kim Spin-orbit torque efficiency in Ta or W/Ta-W/CoFeB junctions Materials Research Express spin-orbit torque Ta-W alloy crystal phase |
| title | Spin-orbit torque efficiency in Ta or W/Ta-W/CoFeB junctions |
| title_full | Spin-orbit torque efficiency in Ta or W/Ta-W/CoFeB junctions |
| title_fullStr | Spin-orbit torque efficiency in Ta or W/Ta-W/CoFeB junctions |
| title_full_unstemmed | Spin-orbit torque efficiency in Ta or W/Ta-W/CoFeB junctions |
| title_short | Spin-orbit torque efficiency in Ta or W/Ta-W/CoFeB junctions |
| title_sort | spin orbit torque efficiency in ta or w ta w cofeb junctions |
| topic | spin-orbit torque Ta-W alloy crystal phase |
| url | https://doi.org/10.1088/2053-1591/ac2c30 |
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