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• W2888542262 abstract "Abstract Current-induced magnetization reversal via spin-orbit torques (SOTs) has been intensively studied in heavy-metal/ferromagnetic-metal/oxide heterostructures due to its promising application in low-energy consumption logic and memory devices. Here, we systematically study the function of Joule heating and SOTs in the current-induced magnetization reversal using Pt/Co/SmO x and Pt/Co/AlO x structures with different perpendicular magnetic anisotropies (PMAs). The SOT-induced effective fields, anisotropy field, switching field and switching current density ( J c ) are characterized using electric transport measurements based on the anomalous Hall effect and polar magneto-optical Kerr effect (MOKE). The results show that the current-generated Joule heating plays an assisted role in the reversal process by reducing switching field and enhancing SOT efficiency. The out-of-plane component of the damping-like-SOT effective field is responsible for the magnetization reversal. The obtained J c for Pt/Co/SmO x and Pt/Co/AlO x structures with similar spin Hall angles and different PMAs remains roughly constant, revealing that the coherent switching model cannot fully explain the current-induced magnetization reversal. In contrast, by observing the domain wall nucleation and expansion using MOKE and comparing the damping-like-SOT effective field and switching field, we conclude that the current-induced magnetization reversal is dominated by the depinning model and J c also immensely relies on the depinning field." @default.
• W2888542262 created "2018-08-31" @default.
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• W2888542262 date "2018-08-28" @default.
• W2888542262 modified "2023-10-14" @default.
• W2888542262 title "Roles of Joule heating and spin-orbit torques in the direct current induced magnetization reversal" @default.
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• W2888542262 doi "https://doi.org/10.1038/s41598-018-31201-2" @default.
• W2888542262 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6113327" @default.
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• W2888542262 hasPublicationYear "2018" @default.
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