Reversible hydrogen control of antiferromagnetic anisotropy in α-Fe
| العنوان: | Reversible hydrogen control of antiferromagnetic anisotropy in α-Fe |
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| المؤلفون: | Hariom, Jani, Jiajun, Linghu, Sonu, Hooda, Rajesh V, Chopdekar, Changjian, Li, Ganesh Ji, Omar, Saurav, Prakash, Yonghua, Du, Ping, Yang, Agnieszka, Banas, Krzysztof, Banas, Siddhartha, Ghosh, Sunil, Ojha, G R, Umapathy, Dinakar, Kanjilal, A, Ariando, Stephen J, Pennycook, Elke, Arenholz, Paolo G, Radaelli, J M D, Coey, Yuan Ping, Feng, T, Venkatesan |
| المصدر: | Nature Communications |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Phase transitions and critical phenomena, Surfaces, interfaces and thin films, Magnetic properties and materials, Condensed Matter::Strongly Correlated Electrons, Spintronics, Article |
| الوصف: | 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. One major challenge for antiferromagnetic spintronics is how to control the antiferromagnetic state. Here Jani et al. demonstrate the reversible ionic control of the room-temperature magnetic anisotropy and spin reorientation transition in haematite, via the incorporation and removal of hydrogen. |
| تدمد: | 2041-1723 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=pmid________::6bdd716f1041019da9c366784d9cfe25 https://pubmed.ncbi.nlm.nih.gov/33712582 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.pmid..........6bdd716f1041019da9c366784d9cfe25 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20411723 |
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