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- W2019347130 abstract "The effects of magnetocrystalline anisotropy (Ku) and magnetization saturation (Ms) on the mechanically induced switching in nanomagnets are studied using a constraint-free phase field model, which allows explicit magneto-mechanical coupling and strictly constant magnetization magnitude. The effects of Ku and Ms on the transition boundary between the coherent and incoherent switching modes are presented in terms of the nanomagnet geometry. It is found that Ms rather than Ku can affect the transition boundary between the two switching modes. In the coherent mode, there exists a critical strain ( εc) to induce a deterministic 90° switching. By using the dynamic nature and overrun behavior of the magnetization, a deterministic 180° switching can occur if the mechanical strain is removed once the magnetization rotates to the largest achievable angle ( ϑ1m). For 90° switching, increasing Ku can enhance both εc and ϑ1m, whereas Ms incurs no noticeable changes. For 180° switching, the switching time (ts) increases with Ms linearly, but initially decreases with increasing Ku and then saturates. The results for ts suggest that moderate Ku and Ms are advisable to simultaneously obtain relatively low εc, quick switching, high storage density, and high magnetization-state stability in nanomagnets. This work provides insight on tuning mechanically assisted nanomagnet-based logic and memory devices through Ms and Ku." @default.
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- W2019347130 date "2015-03-14" @default.
- W2019347130 modified "2023-10-01" @default.
- W2019347130 title "Effects of magnetocrystalline anisotropy and magnetization saturation on the mechanically induced switching in nanomagnets" @default.
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- W2019347130 doi "https://doi.org/10.1063/1.4914485" @default.
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