Enhancement of tunnel magnetoresistance in fully perpendicular MnGa-based magnetic tunnel junctions with metastable bcc CoMnFe interlayer
We investigated the tunnel magnetoresistance (TMR) effect in fully perpendicular magnetized MnGa-based magnetic tunnel junctions (MTJs) with CoFeB as the top electrode. In these perpendicular (p)-MTJs, thin metastable body-centered cubic (bcc) CoMnFe alloys are used as an interlayer between the MgO...
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2025-03-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/9.0000889 |
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| author | Deepak Kumar Naoki Kamata Kwon Hyeokjin Shigemi Mizukami |
| author_facet | Deepak Kumar Naoki Kamata Kwon Hyeokjin Shigemi Mizukami |
| author_sort | Deepak Kumar |
| collection | DOAJ |
| description | We investigated the tunnel magnetoresistance (TMR) effect in fully perpendicular magnetized MnGa-based magnetic tunnel junctions (MTJs) with CoFeB as the top electrode. In these perpendicular (p)-MTJs, thin metastable body-centered cubic (bcc) CoMnFe alloys are used as an interlayer between the MgO barrier and MnGa layers to enhance the TMR ratio. This study highlights the utility of bcc Co-based alloys, such as CoMnFe, which exhibit antiferromagnetic coupling with MnGa in p-MTJs. The TMR ratios of ∼106% and 110% were observed corresponding to single and double interface p-MTJs, respectively, after annealing at 300 °C, demonstrating the potential of these materials for high-performance spin-transfer torque (STT) devices based on p-MTJs. |
| format | Article |
| id | doaj-art-24035d15e6fd45f682bd556ce0cfd717 |
| institution | DOAJ |
| issn | 2158-3226 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj-art-24035d15e6fd45f682bd556ce0cfd7172025-08-20T03:06:24ZengAIP Publishing LLCAIP Advances2158-32262025-03-01153035006035006-810.1063/9.0000889Enhancement of tunnel magnetoresistance in fully perpendicular MnGa-based magnetic tunnel junctions with metastable bcc CoMnFe interlayerDeepak Kumar0Naoki Kamata1Kwon Hyeokjin2Shigemi Mizukami3WPI Advanced Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, JapanWPI Advanced Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, JapanWPI Advanced Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, JapanWPI Advanced Institute for Materials Research, Tohoku University, Katahira 2-1-1, Sendai 980-8577, JapanWe investigated the tunnel magnetoresistance (TMR) effect in fully perpendicular magnetized MnGa-based magnetic tunnel junctions (MTJs) with CoFeB as the top electrode. In these perpendicular (p)-MTJs, thin metastable body-centered cubic (bcc) CoMnFe alloys are used as an interlayer between the MgO barrier and MnGa layers to enhance the TMR ratio. This study highlights the utility of bcc Co-based alloys, such as CoMnFe, which exhibit antiferromagnetic coupling with MnGa in p-MTJs. The TMR ratios of ∼106% and 110% were observed corresponding to single and double interface p-MTJs, respectively, after annealing at 300 °C, demonstrating the potential of these materials for high-performance spin-transfer torque (STT) devices based on p-MTJs.http://dx.doi.org/10.1063/9.0000889 |
| spellingShingle | Deepak Kumar Naoki Kamata Kwon Hyeokjin Shigemi Mizukami Enhancement of tunnel magnetoresistance in fully perpendicular MnGa-based magnetic tunnel junctions with metastable bcc CoMnFe interlayer AIP Advances |
| title | Enhancement of tunnel magnetoresistance in fully perpendicular MnGa-based magnetic tunnel junctions with metastable bcc CoMnFe interlayer |
| title_full | Enhancement of tunnel magnetoresistance in fully perpendicular MnGa-based magnetic tunnel junctions with metastable bcc CoMnFe interlayer |
| title_fullStr | Enhancement of tunnel magnetoresistance in fully perpendicular MnGa-based magnetic tunnel junctions with metastable bcc CoMnFe interlayer |
| title_full_unstemmed | Enhancement of tunnel magnetoresistance in fully perpendicular MnGa-based magnetic tunnel junctions with metastable bcc CoMnFe interlayer |
| title_short | Enhancement of tunnel magnetoresistance in fully perpendicular MnGa-based magnetic tunnel junctions with metastable bcc CoMnFe interlayer |
| title_sort | enhancement of tunnel magnetoresistance in fully perpendicular mnga based magnetic tunnel junctions with metastable bcc comnfe interlayer |
| url | http://dx.doi.org/10.1063/9.0000889 |
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