Author： Tannous C. Gieraltowski J.
Publisher： Edp Sciences
E-ISSN： 1286-4854|115|4|40001-40001
ISSN： 0295-5075
Source： EPL (EUROPHYSICS LETTERS), Vol.115, Iss.4, 2016-09, pp. : 40001-40001
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Abstract
Vortex sensing magnetometers based on arrays of soft magnetic dots are good candidates for high-resolution and accurate spatial magnetic-field estimation. When the arrays are laid out along different spatial directions they can perform tensor gradiometry allowing the measurement of field components and their spatial derivatives as a function of orientation. Detection is based on using spin-polarized currents to counteract vortex displacements or to excite vortex oscillation modes triggered by magnetic-field application. Sensor linearization, field detection range and conditions to obtain large sensitivity electronic compatibility and scalability are discussed.
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