Methods for forming an efficient and effective crossed-fins FinFET device for sensing and measuring magnetic fields and resulting devices are disclosed. Embodiments include forming first-fins, parallel to and spaced from each other, in a first direction on a substrate; forming second-fins, parallel to and spaced from each other on the substrate, in a same plane as the first fins and in a second direction perpendicular to and crossing the first-fins; forming a dummy gate with a spacer on each side over channel areas of the first and second fins; forming source/drain (S/D) regions at opposite ends of each first and second fin; forming an ILD over the fins and the dummy gate and planarizing to reveal the dummy gate; removing the dummy gate, forming a cavity; and forming a high-k/metal gate in the cavity.