Tunneling magnetoresistance in altermagnetic RuO$_2$-based magnetic tunnel junctions
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arXiv
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| Autores principales: | , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| Materias: | |
| Acceso en línea: | |
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| _version_ | 1866913698599141376 |
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| author | Noh, Seunghyeon Kim, Gye-Hyeon Lee, Jiyeon Jung, Hyeonjung Seo, Uihyeon So, Gimok Lee, Jaebyeong Lee, Seunghyun Park, Miju Yang, Seungmin Oh, Yoon Seok Jin, Hosub Sohn, Changhee Yoo, Jung-Woo |
| author_facet | Noh, Seunghyeon Kim, Gye-Hyeon Lee, Jiyeon Jung, Hyeonjung Seo, Uihyeon So, Gimok Lee, Jaebyeong Lee, Seunghyun Park, Miju Yang, Seungmin Oh, Yoon Seok Jin, Hosub Sohn, Changhee Yoo, Jung-Woo |
| contents | Altermagnets exhibit characteristics akin to antiferromagnets, with spin-split anisotropic bands in momentum space. RuO$_2$ has been considered as a prototype altermagnet; however, recent reports have questioned altermagnetic ground state in this material. In this study, we provide direct experimental evidence of altermagnetic characteristics in RuO$_2$ films by demonstrating spin-dependent tunneling magnetoresistance (TMR) in RuO$_2$-based magnetic tunnel junctions. Our results show the spin-splitted anisotropic band structure of RuO$_2$, with the observed TMR determined by the direction of the Néel vector of RuO$_2$. These results reflect the altermagnetic nature of RuO$_2$ and highlight its potential for spintronic applications, leveraging the combined strengths of ferromagnetic and antiferromagnetic systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2502_13599 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Tunneling magnetoresistance in altermagnetic RuO$_2$-based magnetic tunnel junctions Noh, Seunghyeon Kim, Gye-Hyeon Lee, Jiyeon Jung, Hyeonjung Seo, Uihyeon So, Gimok Lee, Jaebyeong Lee, Seunghyun Park, Miju Yang, Seungmin Oh, Yoon Seok Jin, Hosub Sohn, Changhee Yoo, Jung-Woo Materials Science Altermagnets exhibit characteristics akin to antiferromagnets, with spin-split anisotropic bands in momentum space. RuO$_2$ has been considered as a prototype altermagnet; however, recent reports have questioned altermagnetic ground state in this material. In this study, we provide direct experimental evidence of altermagnetic characteristics in RuO$_2$ films by demonstrating spin-dependent tunneling magnetoresistance (TMR) in RuO$_2$-based magnetic tunnel junctions. Our results show the spin-splitted anisotropic band structure of RuO$_2$, with the observed TMR determined by the direction of the Néel vector of RuO$_2$. These results reflect the altermagnetic nature of RuO$_2$ and highlight its potential for spintronic applications, leveraging the combined strengths of ferromagnetic and antiferromagnetic systems. |
| title | Tunneling magnetoresistance in altermagnetic RuO$_2$-based magnetic tunnel junctions |
| topic | Materials Science |
| url | https://arxiv.org/abs/2502.13599 |