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MgO based picotesla field sensors
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View: Figures


Image of FIG. 1.
FIG. 1.

vs loop (hard axis) for the soft magnetic material used as FGs for different shapes with dimensions of (inset). Also indicated are the susceptibilities for the different shapes and dimensions.

Image of FIG. 2.
FIG. 2.

Optical micrograph and schematics of the hybrid device fabricated.

Image of FIG. 3.
FIG. 3.

Transfer curves of MTJ sensors with an area of (left) and (right) with and without flux guides incorporated and longitudinal bias field.

Image of FIG. 4.
FIG. 4.

(a) noise level in the dc to region of the MTJ sensor, described in Figs. 2 and 3, in the linear region (under a longitudinal bias field of ), for a circular MTJ with diameter of with of and a square MTJ with area of with of 10 and . The inset shows the noise levels for different sensors geometries, circular MTJs with diameters of 14, 20, and and square MTJ with area . (b) Measurement extension up to region of a circular MTJ with diameter and a square with area of in the linear and saturation regime for different bias currents.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: MgO based picotesla field sensors