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Perpendicular magnetic clusters with configurable domain structures via dipole-dipole interactions 被引量:1
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作者 Weimin Li Seng Kai Wong +8 位作者 Tun Seng Herng Lee Koon Yap Cheow Hin Sim Zhengchun Yang Yunjie Chen Jianzhong Shi guchang han Junmin Xue Jun Ding 《Nano Research》 SCIE EI CAS CSCD 2015年第11期3639-3650,共12页
Magnetic single-domain islands based on in-plane anisotropy (usually, shape anisotropy) and their dipole-dipole interactions have been investigated extensively in recent years. This has been driven by potential appl... Magnetic single-domain islands based on in-plane anisotropy (usually, shape anisotropy) and their dipole-dipole interactions have been investigated extensively in recent years. This has been driven by potential applications in magnetic recording, spintronics, magneto-biology, etc. Here, we propose a concept of out- of-plane magnetic dusters with configurable domain structures (multi-flux states) via dipole-dipole interactions. Their flux stages can be switched through an external magnetic field. The concept has been successfully demonstrated by patterned [Co/Pd] islands. A [Co/Pd] multilayer exhibits a large perpendicular anisotropy, a strong physical separation, and uniform intrinsic properties after being patterned into individual islands by electron beam lithography. A three- island cluster with six stable flux states has been realized by optimizing island size, thickness, gap, anisotropy, saturation magnetization, etc. Using [Co/Pd] multilayers, we have optimized the island structure by tuning magnetic properties (saturation magnetization and perpendicular anisotropy) using Landau-Liftshitz- Gilbert (LLG) simulation/calculation. Potential applications have been proposed, including a flexi-programmable logic device with AND, OR, NAND, and NOR functionalities and a magnetic domino, which can propagate magnetic current as far as 1 μm down from the surface via vertical dipole-dipole interactions. 展开更多
关键词 perpendicular anisotropy dipole-dipole interaction multistate magnetic recording logic device magnetic domino
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