Copyright © 2015, IEEEMesa, J. L.Díaz Michelena, M.Ciudad, D.Schoenthal, W.McHenry, M. E.Maicas, M.Aroca, C.2022-02-112022-02-112015-03-09IEEE Magnetic Letters 6: 6500104(2015)1949-307Xhttps://ieeexplore.ieee.org/document/7056489http://hdl.handle.net/20.500.12666/512INSPEC Accession Number: 15298193We have designed and fabricated a microelectromechanical device, based on the alternating field gradient concept, to measure surface magnetic field gradient on planets. Its sensitivity is 4 10 -4 T/m, which is appropriate for magnetite outcrops and areas with rocks formed at different stages recording geomagnetic field reversals. We present the results obtained with three different prototypes.engAttribution-NonCommercial-NoDerivatives 4.0 Internationalhttps://creativecommons.org/licenses/by-nc-nd/4.0/Gradient methodsMagnetic InstrumentMicro electro mechanical systemsMicrosensorsinfo:eu-repo/semantics/article10.1109/LMAG.2015.24115761949-3088http://dx.doi.org/10.13039/501100004837info:eu-repo/semantics/openAccess