Perpendicular Magnetization of Ta/Ru/Ta/Co/Fe/MgO Multilayer
| العنوان: | Perpendicular Magnetization of Ta/Ru/Ta/Co/Fe/MgO Multilayer |
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| المؤلفون: | Gi Yoon Bae, Hyungsik Oh, Joon Pyo Kil, Wanjun Park, Yeonhoi Choi, Won Joon Choi |
| المصدر: | IEEE Transactions on Magnetics. 51:1-4 |
| بيانات النشر: | Institute of Electrical and Electronics Engineers (IEEE), 2015. |
| سنة النشر: | 2015 |
| مصطلحات موضوعية: | Magnetic anisotropy, Magnetization, Materials science, Anisotropy energy, Magnetoresistance, Condensed matter physics, Analytical chemistry, Spin-transfer torque, Electrical and Electronic Engineering, Magnetic hysteresis, Anisotropy, Magnetocrystalline anisotropy, Electronic, Optical and Magnetic Materials |
| الوصف: | Magnetic tunnel junctions (MTJs) using perpendicular magnetic anisotropy (PMA) in CoFe(B)/ MgO interface have attracted much attention for high density magnetoresistive random access memory (MRAM) with advantages of scale-down in driving current using for spin transfer torque (STT). In perspective of reliability, further development of the magnetic anisotropy energy (K u ) is required to improve the thermal stability. In this regard, it was theoretically reported that Fe/MgO has a high interfacial anisotropy energy (IAE) for achieving a high K u [1]; however, in-plane magnetic anisotropy (IMA) is experimentally dominated. Especially with Ta seed layer, PMA has not been achieved because magnetocrystalline anisotropy energy of bulk anisotropy (K b ) overwhelms IAE [2]. In this work, we introduce Co film between Ta and Fe/MgO stacks to reduce the effective value of K b for Co/Fe bilayer. Perpendicular magnetization is successfully obtained in Ta/Co/Fe/ MgO structure with ultrathin films of Co and Fe. With multilayered structure, Ta (3 nm)/Ru (3 nm)/ Ta (1 nm)/Co(x: 0.36–0.6 nm)/Fe(y: 0.39–0.91 nm)/MgO (2 nm)/Ta (6 nm), PMA is formed with a proper combination of x and y, and the largest value of K u is estimated as 5.28 MJ/m3 with Co (0.48 nm)/Fe (0.65 nm) which is larger than 2.4 MJ/m3 of CoFe alloy [2]. |
| تدمد: | 1941-0069 0018-9464 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::f86e481d12a14d23813ec0f81a6a3581 https://doi.org/10.1109/tmag.2015.2438324 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........f86e481d12a14d23813ec0f81a6a3581 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19410069 00189464 |
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