Introduced here is an electromechanical actuator that includes a stator assembly with a chamber partially defined therethrough along a central longitudinal axis and a plunger assembly that is situated in the chamber and, in operation, moves along the central longitudinal axis between different positions. The stator assembly can include a pair of contacts that have an opening therebetween and a trinity of ferromagnetic layers with coils situated therebetween. The plunger assembly can include a magnet. When current is applied to the coils, the trinity of ferromagnetic layers become magnetically polarized, thereby dictating the motion of the plunger assembly by magnetically attracting or repelling the magnet included in the plunger assembly. The plunger assembly may be stabilized by a flexure flexibly connecting the stator assembly and plunger assembly.

A MEMS sensor device includes an electrically conductive membrane and an electrically conductive closed loop structure. The closed loop structure is arranged in proximity to the membrane and is configured to reduce eddy currents in the membrane.

A magnetic device may include a magnetic structure, a device structure, and an associated circuit. The magnetic structure may include a patterned layer of material having a predetermined magnetic property. The patterned layer may be configured to, e.g., provide a magnetic field, sense a magnetic field, channel or concentrate magnetic flux, shield a component from a magnetic field, or provide magnetically actuated motion, etc. The device structure may be another structure of the device that is physically connected to or arranged relative to the magnetic structure to, e.g., structurally support, enable operation of, or otherwise incorporate the magnetic structure into the magnetic device, etc. The associated circuit may be electrically connected to the magnetic structure to receive, provide, condition or process of signals of the magnetic device.