Spontaneously induced magnetic anisotropy in an ultrathin Co/MoS2 heterojunction
| العنوان: | Spontaneously induced magnetic anisotropy in an ultrathin Co/MoS2 heterojunction |
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| المؤلفون: | Feng Li, Chun-I Lu, Yann Wen Lan, Kai Shin Li, Chih Heng Huang, Junjie Qi, Kui Hon Ou Yang, Kristan Bryan Simbulan, Christian Tusche, Der-Hsin Wei, Tzu Hung Chuang, Vitaliy Feyer, Minn-Tsong Lin, Iulia Cojocariu, Matteo Jugovac |
| المصدر: | Nanoscale horizons 5(7), 1058-1064 (2020). doi:10.1039/D0NH00108B |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Materials science, Condensed matter physics, Spintronics, Heterojunction, 02 engineering and technology, 021001 nanoscience & nanotechnology, 01 natural sciences, Micrometre, Magnetization, Magnetic anisotropy, X-ray photoelectron spectroscopy, Ferromagnetism, ddc:540, 0103 physical sciences, Monolayer, General Materials Science, 010306 general physics, 0210 nano-technology |
| الوصف: | Magnetic anisotropy (MA) is a material preference that involves magnetization aligned along a specific direction and provides a basis for spintronic devices. Here we report the first observation of strong MA in a cobalt–molybdenum disulfide (Co/MoS2) heterojunction. Element-specific magnetic images recorded with an X-ray photoemission electron microscope (PEEM) reveal that ultrathin Co films, of thickness 5 monolayers (ML) and above, form micrometer (μm)-sized domains on monolayer MoS2 flakes of size tens of μm. Image analysis shows that the magnetization of these Co domains is oriented not randomly but in directions apparently correlated with the crystal structure of the underlying MoS2. Evidence from micro-area X-ray photoelectron spectra (μ-XPS) further indicates that a small amount of charge is donated from cobalt to sulfur upon direct contact between Co and MoS2. As the ferromagnetic behavior found for Co/MoS2 is in sharp contrast with that reported earlier for non-reactive Fe/MoS2, we suggest that orbital hybridization at the interface is what makes Co/MoS2 different. Our report provides micro-magnetic and micro-spectral evidence that consolidates the knowledge required to build functional heterojunctions based on two-dimensional (2D) materials. |
| تدمد: | 2055-6764 2055-6756 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::02543044428b558148527de074fec32eTest https://doi.org/10.1039/d0nh00108bTest |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....02543044428b558148527de074fec32e |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20556764 20556756 |
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