Formation of helical spin alignment in the AFM/FM/AFM trilayers by spin–orbit torque controlled exchange bias
Non-collinear spin structures can exhibit unusual magnetic properties that cannot be expected in an ordinary collinear ferromagnet (FM) due to the chiral alignment of magnetic moments, offering new opportunities for applications in the field of spintronics. In the present study, we demonstrate that...
| Main Authors: | , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2023-12-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/5.0175965 |
| _version_ | 1797367018522935296 |
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| author | Won-Chang Choi Seongsoo Yoon Hyun-Joong Kim Jae-Hyun Ha Kwon-Jin Park Eunchong Baek Dong-Ryul Kim Yooleemi Shin Chun-Yeol You Ji-Wan Kim Jung-Il Hong |
| author_facet | Won-Chang Choi Seongsoo Yoon Hyun-Joong Kim Jae-Hyun Ha Kwon-Jin Park Eunchong Baek Dong-Ryul Kim Yooleemi Shin Chun-Yeol You Ji-Wan Kim Jung-Il Hong |
| author_sort | Won-Chang Choi |
| collection | DOAJ |
| description | Non-collinear spin structures can exhibit unusual magnetic properties that cannot be expected in an ordinary collinear ferromagnet (FM) due to the chiral alignment of magnetic moments, offering new opportunities for applications in the field of spintronics. In the present study, we demonstrate that exchange bias pinning can be applied to a single FM layer in two different directions simultaneously, resulting in modified magnetic behaviors due to the formation of non-collinear helical spin structures in the multilayers of Co0.7Ni0.3O (antiferromagnet, AFM)/Co0.7Ni0.3 (FM)/Co0.7Ni0.3O (AFM)/Pt (heavy metal, HM). The pinning of spins at one interface between FM and AFM/HM was controlled by spin Hall current originating from the electrical current through the HM layer at room temperature, while the spins at the other interface between FM and AFM were pinned in a fixed direction, hence allowing for the formation of a helical spin structure along the FM layer thickness with controllable chirality at room temperature. Modified magnetic behaviors of a helical spin structure were confirmed from measurements of magnetic hysteresis and magnetoresistance, as well as direct observation of magnetic domains. |
| first_indexed | 2024-03-08T17:11:53Z |
| format | Article |
| id | doaj.art-7c43764eefef4c5db2bc51e4a4b15165 |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-03-08T17:11:53Z |
| publishDate | 2023-12-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-7c43764eefef4c5db2bc51e4a4b151652024-01-03T19:56:07ZengAIP Publishing LLCAPL Materials2166-532X2023-12-011112121115121115-810.1063/5.0175965Formation of helical spin alignment in the AFM/FM/AFM trilayers by spin–orbit torque controlled exchange biasWon-Chang Choi0Seongsoo Yoon1Hyun-Joong Kim2Jae-Hyun Ha3Kwon-Jin Park4Eunchong Baek5Dong-Ryul Kim6Yooleemi Shin7Chun-Yeol You8Ji-Wan Kim9Jung-Il Hong10Department of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of KoreaDepartment of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of KoreaQuantum Spin Team, Korea Research Institute of Standards and Science (KRISS), Daejeon 34113, Republic of KoreaDepartment of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of KoreaDepartment of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of KoreaDepartment of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of KoreaDepartment of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of KoreaDepartment of Physics, Kunsan National University, Kunsan 54150, Republic of KoreaDepartment of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of KoreaDepartment of Physics, Kunsan National University, Kunsan 54150, Republic of KoreaDepartment of Physics and Chemistry, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu 42988, Republic of KoreaNon-collinear spin structures can exhibit unusual magnetic properties that cannot be expected in an ordinary collinear ferromagnet (FM) due to the chiral alignment of magnetic moments, offering new opportunities for applications in the field of spintronics. In the present study, we demonstrate that exchange bias pinning can be applied to a single FM layer in two different directions simultaneously, resulting in modified magnetic behaviors due to the formation of non-collinear helical spin structures in the multilayers of Co0.7Ni0.3O (antiferromagnet, AFM)/Co0.7Ni0.3 (FM)/Co0.7Ni0.3O (AFM)/Pt (heavy metal, HM). The pinning of spins at one interface between FM and AFM/HM was controlled by spin Hall current originating from the electrical current through the HM layer at room temperature, while the spins at the other interface between FM and AFM were pinned in a fixed direction, hence allowing for the formation of a helical spin structure along the FM layer thickness with controllable chirality at room temperature. Modified magnetic behaviors of a helical spin structure were confirmed from measurements of magnetic hysteresis and magnetoresistance, as well as direct observation of magnetic domains.http://dx.doi.org/10.1063/5.0175965 |
| spellingShingle | Won-Chang Choi Seongsoo Yoon Hyun-Joong Kim Jae-Hyun Ha Kwon-Jin Park Eunchong Baek Dong-Ryul Kim Yooleemi Shin Chun-Yeol You Ji-Wan Kim Jung-Il Hong Formation of helical spin alignment in the AFM/FM/AFM trilayers by spin–orbit torque controlled exchange bias APL Materials |
| title | Formation of helical spin alignment in the AFM/FM/AFM trilayers by spin–orbit torque controlled exchange bias |
| title_full | Formation of helical spin alignment in the AFM/FM/AFM trilayers by spin–orbit torque controlled exchange bias |
| title_fullStr | Formation of helical spin alignment in the AFM/FM/AFM trilayers by spin–orbit torque controlled exchange bias |
| title_full_unstemmed | Formation of helical spin alignment in the AFM/FM/AFM trilayers by spin–orbit torque controlled exchange bias |
| title_short | Formation of helical spin alignment in the AFM/FM/AFM trilayers by spin–orbit torque controlled exchange bias |
| title_sort | formation of helical spin alignment in the afm fm afm trilayers by spin orbit torque controlled exchange bias |
| url | http://dx.doi.org/10.1063/5.0175965 |
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