All-electrical magnetic vortex array sensing
1 Laboratoire de Magnétisme de Bretagne - CNRS FRE-3117, Université de Bretagne Occidentale 6, Avenue le Gorgeu C.S.93837, 29238 Brest Cedex 3, France
2 Laboratoire des Domaines Océaniques (IUEM) - CNRS UMR-6538, Technopôle Brest IROISE 29280 Plouzané, France
Received: 22 April 2016
Accepted: 29 August 2016
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.
PACS: 07.55.Ge – Magnetometers for magnetic field measurements / 75.60.Jk – Magnetization reversal mechanisms
© EPLA, 2016