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Exchange-coupled bilayers are widely used as pinned layers in nanometric spintronic devices. In this work, sub-100 nm-diameter CoFeB/IrMn antidot and nanodot arrays were patterned by nanosphere lithography. The exchange bias (Hex) and coercivity (Hc) of the nanostructures and continuous films exhibit similar exponential dependence on CoFeB layer thickness. Magnetic field annealing results in changed...
The coercivity (Hc) and switching field (Hsw) of free layers increase remarkably with shrinking structural dimensions, reducing the sensitivity of nanosized magnetoresistive sensors. In this work, conetic-alloy (NiFeCuMo) synthetic ferrimagnetic (SyF) trilayers are proposed to reduce Hc and Hsw in magnetic nanostructures. SyF stacks of NiFeCuMo/Ru/NiFeCuMo were patterned into nanodot arrays with diameter...
Exchange bias effect in nanostructures are widely investigated for applications in nanometric spintronic sensors. In this work, nanosphere lithography was adopted to pattern CoFeB/IrMn antidot and nanodot arrays. The exchange bias and coercivity of the nanostructures and continuous films exhibit similar exponential dependence on CoFeB layer thickness. High temperature annealing results in decreased...
The coercivity (Hc) and switching field (Hsw) of free layers increase remarkably with shrinking size, which reduces the sensitivity of spintronic devices. Conetic-alloy-based synthetic ferrimagnetic (SyF) trilayers are proposed to show reduced Hc and Hw than single-layer in nanodots. The investigation on the thickness dependence reveals linear reliance of Hc and Hw on amplification factor. Hc and...
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