Reversible hydrogen control of antiferromagnetic anisotropy in α-Fe2O3
| Autor: | Dinakar Kanjilal, Stephen J. Pennycook, Krzysztof Banas, Sunil Ojha, G.R. Umapathy, Ping Yang, Saurav Prakash, Rajesh V. Chopdekar, Jiajun Linghu, Hariom Jani, Elke Arenholz, Ariando Ariando, Siddhartha Ghosh, Yuan Ping Feng, J. M. D. Coey, Agnieszka Banas, Sonu Hooda, Paolo G. Radaelli, T. Venkatesan, Yonghua Du, Ganesh Ji Omar, Changjian Li |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Multidisciplinary
Materials science Condensed matter physics Spintronics Magnetism Science General Physics and Astronomy Ionic bonding 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology 01 natural sciences General Biochemistry Genetics and Molecular Biology Magnetic field Magnetic anisotropy Condensed Matter::Materials Science 0103 physical sciences Antiferromagnetism Condensed Matter::Strongly Correlated Electrons 010306 general physics 0210 nano-technology Anisotropy Spin-½ |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-10 (2021) Nature communications, vol 12, iss 1 |
| ISSN: | 2041-1723 |
| Popis: | Antiferromagnetic insulators are a ubiquitous class of magnetic materials, holding the promise of low-dissipation spin-based computing devices that can display ultra-fast switching and are robust against stray fields. However, their imperviousness to magnetic fields also makes them difficult to control in a reversible and scalable manner. Here we demonstrate a novel proof-of-principle ionic approach to control the spin reorientation (Morin) transition reversibly in the common antiferromagnetic insulator α-Fe2O3 (haematite) – now an emerging spintronic material that hosts topological antiferromagnetic spin-textures and long magnon-diffusion lengths. We use a low-temperature catalytic-spillover process involving the post-growth incorporation or removal of hydrogen from α-Fe2O3 thin films. Hydrogenation drives pronounced changes in its magnetic anisotropy, Néel vector orientation and canted magnetism via electron injection and local distortions. We explain these effects with a detailed magnetic anisotropy model and first-principles calculations. Tailoring our work for future applications, we demonstrate reversible control of the room-temperature spin-state by doping/expelling hydrogen in Rh-substituted α-Fe2O3. |
| Databáze: | OpenAIRE |
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