Effects of thermal annealing on the spin–orbit torque and unidirectional spin Hall magnetoresistance in Pt/CoFe/Ta trilayers
We investigated the spin–orbit torque (SOT) and unidirectional spin Hall magnetoresistance (USMR) in Pt/CoFe/Ta trilayer as well as Pt/CoFe and CoFe/Ta bilayers with in-plane magnetic anisotropy by performing transverse and longitudinal second harmonic resistance measurements. Compared to the two bi...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2023-05-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/5.0146097 |
| _version_ | 1797771862309076992 |
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| author | Guonan Feng Di Fu Xi Chen Jintao Liu Xinyan Yang Xiaorong Liang Penghao Lv Di Zhao Minggao Zuo Guanghua Yu |
| author_facet | Guonan Feng Di Fu Xi Chen Jintao Liu Xinyan Yang Xiaorong Liang Penghao Lv Di Zhao Minggao Zuo Guanghua Yu |
| author_sort | Guonan Feng |
| collection | DOAJ |
| description | We investigated the spin–orbit torque (SOT) and unidirectional spin Hall magnetoresistance (USMR) in Pt/CoFe/Ta trilayer as well as Pt/CoFe and CoFe/Ta bilayers with in-plane magnetic anisotropy by performing transverse and longitudinal second harmonic resistance measurements. Compared to the two bilayers, we found that the trilayer exhibits enhanced SOT and USMR due to the opposite spin Hall angles of Pt and Ta, which work together to enhance the spin accumulation in the trilayer. Furthermore, we found that thermal annealing has a significant influence on the magnitude and sign of the SOT and USMR in the Pt/CoFe/Ta trilayers. Specifically, we observed that both the damping-like SOT and USMR of the trilayer decrease as the annealing temperature increases, and they even change signs at an annealing temperature between 235 and 265 °C. In contrast, the sign change of the SOT and USMR upon annealing is absent in the Pt/CoFe and CoFe/Ta bilayers. These findings suggest that the sign of the SOT and USMR in the Pt/CoFe/Ta trilayer can be easily manipulated by using an appropriate thermal annealing treatment, which has important implications for the development of novel spintronic devices. |
| first_indexed | 2024-03-12T21:42:44Z |
| format | Article |
| id | doaj.art-c8f33b2f704846e291a48c205255957b |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-03-12T21:42:44Z |
| publishDate | 2023-05-01 |
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| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-c8f33b2f704846e291a48c205255957b2023-07-26T15:31:53ZengAIP Publishing LLCAIP Advances2158-32262023-05-01135055022055022-810.1063/5.0146097Effects of thermal annealing on the spin–orbit torque and unidirectional spin Hall magnetoresistance in Pt/CoFe/Ta trilayersGuonan Feng0Di Fu1Xi Chen2Jintao Liu3Xinyan Yang4Xiaorong Liang5Penghao Lv6Di Zhao7Minggao Zuo8Guanghua Yu9Department of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, ChinaMIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Institute of Optoelectronics and Nanomaterials, Nanjing University of Science and Technology, Nanjing 210094, ChinaMIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Institute of Optoelectronics and Nanomaterials, Nanjing University of Science and Technology, Nanjing 210094, ChinaDepartment of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, ChinaDepartment of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, ChinaMIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Institute of Optoelectronics and Nanomaterials, Nanjing University of Science and Technology, Nanjing 210094, ChinaMIIT Key Laboratory of Advanced Display Materials and Devices, School of Materials Science and Engineering, Institute of Optoelectronics and Nanomaterials, Nanjing University of Science and Technology, Nanjing 210094, ChinaDepartment of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, ChinaDepartment of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, ChinaDepartment of Materials Physics and Chemistry, University of Science and Technology Beijing, Beijing 100083, ChinaWe investigated the spin–orbit torque (SOT) and unidirectional spin Hall magnetoresistance (USMR) in Pt/CoFe/Ta trilayer as well as Pt/CoFe and CoFe/Ta bilayers with in-plane magnetic anisotropy by performing transverse and longitudinal second harmonic resistance measurements. Compared to the two bilayers, we found that the trilayer exhibits enhanced SOT and USMR due to the opposite spin Hall angles of Pt and Ta, which work together to enhance the spin accumulation in the trilayer. Furthermore, we found that thermal annealing has a significant influence on the magnitude and sign of the SOT and USMR in the Pt/CoFe/Ta trilayers. Specifically, we observed that both the damping-like SOT and USMR of the trilayer decrease as the annealing temperature increases, and they even change signs at an annealing temperature between 235 and 265 °C. In contrast, the sign change of the SOT and USMR upon annealing is absent in the Pt/CoFe and CoFe/Ta bilayers. These findings suggest that the sign of the SOT and USMR in the Pt/CoFe/Ta trilayer can be easily manipulated by using an appropriate thermal annealing treatment, which has important implications for the development of novel spintronic devices.http://dx.doi.org/10.1063/5.0146097 |
| spellingShingle | Guonan Feng Di Fu Xi Chen Jintao Liu Xinyan Yang Xiaorong Liang Penghao Lv Di Zhao Minggao Zuo Guanghua Yu Effects of thermal annealing on the spin–orbit torque and unidirectional spin Hall magnetoresistance in Pt/CoFe/Ta trilayers AIP Advances |
| title | Effects of thermal annealing on the spin–orbit torque and unidirectional spin Hall magnetoresistance in Pt/CoFe/Ta trilayers |
| title_full | Effects of thermal annealing on the spin–orbit torque and unidirectional spin Hall magnetoresistance in Pt/CoFe/Ta trilayers |
| title_fullStr | Effects of thermal annealing on the spin–orbit torque and unidirectional spin Hall magnetoresistance in Pt/CoFe/Ta trilayers |
| title_full_unstemmed | Effects of thermal annealing on the spin–orbit torque and unidirectional spin Hall magnetoresistance in Pt/CoFe/Ta trilayers |
| title_short | Effects of thermal annealing on the spin–orbit torque and unidirectional spin Hall magnetoresistance in Pt/CoFe/Ta trilayers |
| title_sort | effects of thermal annealing on the spin orbit torque and unidirectional spin hall magnetoresistance in pt cofe ta trilayers |
| url | http://dx.doi.org/10.1063/5.0146097 |
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