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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2403.05383 |
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| _version_ | 1866911056364830720 |
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| author | Balan, Aravind Puthirath Kumar, Aditya Reiser, Patrick Vas, Joseph Denneulin, Thibaud Lee, Khoa Dang Saunderson, Tom G Tschudin, Marta Pellet-Mary, Clement Dutta, Debarghya Schrader, Carolin Scholz, Tanja Geuchies, Jaco Fu, Shuai Wang, Hai Bonanni, Alberta Lotsch, Bettina V. Nowak, Ulrich Jakob, Gerhard Gayles, Jacob Kovacs, Andras Dunin-Borkowski, Rafal E. Maletinsky, Patrick Klaeui, Mathias |
| author_facet | Balan, Aravind Puthirath Kumar, Aditya Reiser, Patrick Vas, Joseph Denneulin, Thibaud Lee, Khoa Dang Saunderson, Tom G Tschudin, Marta Pellet-Mary, Clement Dutta, Debarghya Schrader, Carolin Scholz, Tanja Geuchies, Jaco Fu, Shuai Wang, Hai Bonanni, Alberta Lotsch, Bettina V. Nowak, Ulrich Jakob, Gerhard Gayles, Jacob Kovacs, Andras Dunin-Borkowski, Rafal E. Maletinsky, Patrick Klaeui, Mathias |
| contents | The exchange bias phenomenon, inherent in exchange-coupled ferromagnetic and antiferromagnetic systems, has intrigued researchers for decades. Van der Waals materials, with their layered structure, provide an optimal platform for probing such physical phenomena. However, achieving a facile and effective means to manipulate exchange bias in van der Waals heterostructures remains challenging. In this study, we investigate the origin of exchange bias in MnPS3/Fe3GeTe2 van der Waals heterostructures. Our work demonstrates a method to modulate unidirectional exchange anisotropy, achieving an unprecedented nearly 1000% variation through simple thermal cycling. Despite the compensated interfacial spin configuration of MnPS3, magneto-transport measurements reveal a huge 170 mT exchange bias at 5 K, one of the largest observed in van der Waals antiferromagnet-ferromagnet interfaces. This substantial magnitude of the exchange bias is linked to an anomalous weak ferromagnetic ordering in MnPS3 below 40 K. On the other hand, the tunability of exchange bias during thermal cycling is ascribed to the modified arrangement of interfacial atoms and changes in the vdW gap during field cooling. Our findings highlight a robust and easily adjustable exchange bias in van der Waals antiferromagnetic/ferromagnetic heterostructures, presenting a straightforward approach to enhance other interface-related spintronic phenomena for practical applications. A detailed study of the interface reveals migration of atoms between the layers, leading to the formation of amorphous region on either side of the van der Waals gap, underscoring the importance of precise characterization of interfaces in van der Waals heterostructures, which are often presumed to have pristine interfaces. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_05383 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Identifying the Origin of Thermal Modulation of Exchange Bias in MnPS3/Fe3GeTe2 van der Waals Heterostructures Balan, Aravind Puthirath Kumar, Aditya Reiser, Patrick Vas, Joseph Denneulin, Thibaud Lee, Khoa Dang Saunderson, Tom G Tschudin, Marta Pellet-Mary, Clement Dutta, Debarghya Schrader, Carolin Scholz, Tanja Geuchies, Jaco Fu, Shuai Wang, Hai Bonanni, Alberta Lotsch, Bettina V. Nowak, Ulrich Jakob, Gerhard Gayles, Jacob Kovacs, Andras Dunin-Borkowski, Rafal E. Maletinsky, Patrick Klaeui, Mathias Materials Science The exchange bias phenomenon, inherent in exchange-coupled ferromagnetic and antiferromagnetic systems, has intrigued researchers for decades. Van der Waals materials, with their layered structure, provide an optimal platform for probing such physical phenomena. However, achieving a facile and effective means to manipulate exchange bias in van der Waals heterostructures remains challenging. In this study, we investigate the origin of exchange bias in MnPS3/Fe3GeTe2 van der Waals heterostructures. Our work demonstrates a method to modulate unidirectional exchange anisotropy, achieving an unprecedented nearly 1000% variation through simple thermal cycling. Despite the compensated interfacial spin configuration of MnPS3, magneto-transport measurements reveal a huge 170 mT exchange bias at 5 K, one of the largest observed in van der Waals antiferromagnet-ferromagnet interfaces. This substantial magnitude of the exchange bias is linked to an anomalous weak ferromagnetic ordering in MnPS3 below 40 K. On the other hand, the tunability of exchange bias during thermal cycling is ascribed to the modified arrangement of interfacial atoms and changes in the vdW gap during field cooling. Our findings highlight a robust and easily adjustable exchange bias in van der Waals antiferromagnetic/ferromagnetic heterostructures, presenting a straightforward approach to enhance other interface-related spintronic phenomena for practical applications. A detailed study of the interface reveals migration of atoms between the layers, leading to the formation of amorphous region on either side of the van der Waals gap, underscoring the importance of precise characterization of interfaces in van der Waals heterostructures, which are often presumed to have pristine interfaces. |
| title | Identifying the Origin of Thermal Modulation of Exchange Bias in MnPS3/Fe3GeTe2 van der Waals Heterostructures |
| topic | Materials Science |
| url | https://arxiv.org/abs/2403.05383 |