Spin-torque sensor with tunable sensitivity and detection range

Kim, Sang-Il; Seo, Min Hong; Choi, Yeon Suk; Park, Seung-Young

doi:10.1088/0022-3727/47/44/445004

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2015

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“…The values shown in this work are also close to those recently reported by Kim et al using a completely different strategy. They resorted to a bipolar pulse-driven spin transfer torque (STT) MTJ sensor leading to increased sensitivity values, but also displaying transfer curves with a significant number of discontinuities, besides requiring large biasing voltages (600 mV), which may be a drawback in particular applications [57].…”

Section: Fabricated Devicesmentioning

confidence: 99%

Magnetoresistive nanosensors: controlling magnetism at the nanoscale

Leitao

Silva

Paz³

et al. 2015

Nanotechnology

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The ability to detect the magnetic fields that surround us has promoted vast technological advances in sensing techniques. Among those, magnetoresistive sensors display an unpaired spatial resolution. Here, we successfully control the linear range of nanometric sensors using an interfacial exchange bias sensing layer coupling. An effective matching of material properties and sensor geometry improves the nanosensor performance, with top sensitivities of 3.7% mT(-1). The experimental results are well supported by 3D micromagnetic and magneto-transport simulations.

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Section: Fabricated Devicesmentioning

confidence: 99%