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arXiv · 1707.00231

Semitransparent anisotropic and spin Hall magnetoresistance sensor enabled by spin-orbit toque biasing

Yumeng Yang·Yanjun Xu·Hang Xie·Baoxi Xu·Yihong Wu
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Abstract

We demonstrate an ultrathin and semitransparent anisotropic and spin Hall magnetoresistance sensor based on NiFe/Pt heterostructure. The use of spin-orbit torque effective field for transverse biasing allows to reduce the total thickness of the sensors down to 3 - 4 nm and thereby leading to the semitransparency. Despite the extremely simple design, the spin-orbit torque effective field biased NiFe/Pt sensor exhibits level of linearity and sensitivity comparable to those of sensors using more complex linearization schemes. In a proof-of-concept design using a full Wheatstone bridge comprising of four sensing elements, we obtained a sensitivity up to 202.9 m{\Omega}/Oe, linearity error below 5%, and a detection limit down to 20 nT. The transmittance of the sensor is over 50% in the visible range.

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Yumeng Yang, Yanjun Xu, Hang Xie, Baoxi Xu, Yihong Wu. 2017-07-02. Semitransparent anisotropic and spin Hall magnetoresistance sensor enabled by spin-orbit toque biasing. https://doi.org/10.1063/1.4993899

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