Detailed and high-throughput measurement of composition dependence of magnetoresistance and spin–transfer torque using a composition-gradient film: application to CoxFe1-x (0 ≤ x ≤ 1) system
We develop a high-throughput method for measuring the composition dependence of magnetoresistance (MR) and spin-transfer-torque (STT) effects in current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices and report its application to the CoFe system. The method is based on the use of c...
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Taylor & Francis Group
2023-12-01
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| Series: | Science and Technology of Advanced Materials: Methods |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/27660400.2023.2286944 |
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| author | Vineet Barwal Hirofumi Suto Tomohiro Taniguchi Yuya Sakuraba |
| author_facet | Vineet Barwal Hirofumi Suto Tomohiro Taniguchi Yuya Sakuraba |
| author_sort | Vineet Barwal |
| collection | DOAJ |
| description | We develop a high-throughput method for measuring the composition dependence of magnetoresistance (MR) and spin-transfer-torque (STT) effects in current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices and report its application to the CoFe system. The method is based on the use of composition-gradient films deposited by combinatorial sputtering. This structure allows the fabrication of devices with different compositions on a single substrate, drastically enhancing the throughput in investigating composition dependence. We fabricated CPP-GMR devices on a single GMR film consisting of a CoxFe1-x (0 ≤ x ≤ 1) composition-gradient layer, a Cu spacer layer, and a NiFe layer. The MR ratio obtained from resistance-field measurements exhibited the maximum in the broad Co concentration range of 0.3 ≤ x ≤ 0.65. In addition, the STT efficiency was estimated from the current to induce magnetization reversal of the NiFe layer by spin injection from the CoxFe1-x layer. The STT efficiency was also the highest around the same Co concentration range as for the MR ratio, and this correlation was theoretically explained by the change in the spin polarization of the CoxFe1-x layer. The results revealed the CoxFe1-x composition range suitable for spintronic applications, demonstrating the advantages of the developed method. |
| format | Article |
| id | doaj-art-2022016a48b7415d928f08452bb80924 |
| institution | DOAJ |
| issn | 2766-0400 |
| language | English |
| publishDate | 2023-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Science and Technology of Advanced Materials: Methods |
| spelling | doaj-art-2022016a48b7415d928f08452bb809242025-08-20T02:57:55ZengTaylor & Francis GroupScience and Technology of Advanced Materials: Methods2766-04002023-12-013110.1080/27660400.2023.2286944Detailed and high-throughput measurement of composition dependence of magnetoresistance and spin–transfer torque using a composition-gradient film: application to CoxFe1-x (0 ≤ x ≤ 1) systemVineet Barwal0Hirofumi Suto1Tomohiro Taniguchi2Yuya Sakuraba3Research Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS), Tsukuba, JapanResearch Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS), Tsukuba, JapanResearch Center for Emerging Computing Technologies, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, JapanResearch Center for Magnetic and Spintronic Materials, National Institute for Materials Science (NIMS), Tsukuba, JapanWe develop a high-throughput method for measuring the composition dependence of magnetoresistance (MR) and spin-transfer-torque (STT) effects in current-perpendicular-to-plane giant magnetoresistance (CPP-GMR) devices and report its application to the CoFe system. The method is based on the use of composition-gradient films deposited by combinatorial sputtering. This structure allows the fabrication of devices with different compositions on a single substrate, drastically enhancing the throughput in investigating composition dependence. We fabricated CPP-GMR devices on a single GMR film consisting of a CoxFe1-x (0 ≤ x ≤ 1) composition-gradient layer, a Cu spacer layer, and a NiFe layer. The MR ratio obtained from resistance-field measurements exhibited the maximum in the broad Co concentration range of 0.3 ≤ x ≤ 0.65. In addition, the STT efficiency was estimated from the current to induce magnetization reversal of the NiFe layer by spin injection from the CoxFe1-x layer. The STT efficiency was also the highest around the same Co concentration range as for the MR ratio, and this correlation was theoretically explained by the change in the spin polarization of the CoxFe1-x layer. The results revealed the CoxFe1-x composition range suitable for spintronic applications, demonstrating the advantages of the developed method.https://www.tandfonline.com/doi/10.1080/27660400.2023.2286944High-throughput measurementcombinatorial sputteringcomposition-gradient filmgiant magnetoresistancespin–transfer torquecomposition dependence |
| spellingShingle | Vineet Barwal Hirofumi Suto Tomohiro Taniguchi Yuya Sakuraba Detailed and high-throughput measurement of composition dependence of magnetoresistance and spin–transfer torque using a composition-gradient film: application to CoxFe1-x (0 ≤ x ≤ 1) system Science and Technology of Advanced Materials: Methods High-throughput measurement combinatorial sputtering composition-gradient film giant magnetoresistance spin–transfer torque composition dependence |
| title | Detailed and high-throughput measurement of composition dependence of magnetoresistance and spin–transfer torque using a composition-gradient film: application to CoxFe1-x (0 ≤ x ≤ 1) system |
| title_full | Detailed and high-throughput measurement of composition dependence of magnetoresistance and spin–transfer torque using a composition-gradient film: application to CoxFe1-x (0 ≤ x ≤ 1) system |
| title_fullStr | Detailed and high-throughput measurement of composition dependence of magnetoresistance and spin–transfer torque using a composition-gradient film: application to CoxFe1-x (0 ≤ x ≤ 1) system |
| title_full_unstemmed | Detailed and high-throughput measurement of composition dependence of magnetoresistance and spin–transfer torque using a composition-gradient film: application to CoxFe1-x (0 ≤ x ≤ 1) system |
| title_short | Detailed and high-throughput measurement of composition dependence of magnetoresistance and spin–transfer torque using a composition-gradient film: application to CoxFe1-x (0 ≤ x ≤ 1) system |
| title_sort | detailed and high throughput measurement of composition dependence of magnetoresistance and spin transfer torque using a composition gradient film application to coxfe1 x 0 ≤ x ≤ 1 system |
| topic | High-throughput measurement combinatorial sputtering composition-gradient film giant magnetoresistance spin–transfer torque composition dependence |
| url | https://www.tandfonline.com/doi/10.1080/27660400.2023.2286944 |
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