Interfacial magnetic coupling in Co/antiferromagnetic van der Waals compound FePS3
| Autor: | Chin-Shan Lue, Tzu Hung Chuang, Der-Hsin Wei, Po Chun Chang, Alltrin Dhanarajgopal, C. C. Kuo, Chia Nung Kuo, Shi Yu Liu, Wen Chin Lin |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Condensed matter physics Magnetic circular dichroism Magnetism General Physics and Astronomy Surfaces and Interfaces General Chemistry Coercivity Condensed Matter Physics Surfaces Coatings and Films symbols.namesake Magnetization Ferromagnetism symbols Antiferromagnetism van der Waals force Néel temperature |
| Zdroj: | Applied Surface Science. 567:150864 |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2021.150864 |
| Popis: | In this study, a Co-thin film was deposited on the van der Waals compound of FePS 3 for the investigation of interfacial magnetic coupling, which is crucial to the application in spintronic devices. As characterized by atomic force microscopy, the exfoliated FePS 3 surface was composed of defects within ± 1 monolayer height. The Co thin film covered the FePS 3 substrate uniformly with a roughness within ± 0.5 nm. The 2 nm-Pd/7 nm-Co/FePS 3 exhibited isotropic magnetism in the surface plane and the magnetic coercivity drastically decreased by more than 50% when the temperature was elevated from 85 K to 110–120 K, which is nearly the Neel temperature of FePS 3 . This observation indicates the interfacial magnetic coupling between Co and FePS 3 . The Co/FePS 3 magnetic coupling is robust even after annealing up to 200 °C. Furthermore, the measurement of X -ray magnetic circular dichroism confirmed the presence of non-compensated Fe moment along the in-plane direction is parallel to the Co magnetization direction. The net Fe-moment is supposed to play an essential role in mediating the magnetic coupling between the in-plane ferromagnetic Co and the perpendicular antiferromagnetic FePS 3 . |
| Databáze: | OpenAIRE |
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