Devices, systems and methods including magnetic structures

A magnetic device, comprising:

• a semiconductor substrate;
• a cap mounted on the semiconductor substrate;
• a micromechanical structure on the semiconductor substrate and under the cap;
• a magnetic structure disposed vertically relative to the cap, the magnetic structure including a patterned layer of magnetic material;
• and
• a circuit electrically coupled to the magnetic structure.

A magnetic device, comprising:

• a magnetic sensor including patterned magnetoresistive material, the magnetic sensor having an operational sensitivity to magnetic fields in a first direction;
• a circuit electrically coupled to the magnetic sensor;
• and
• a magnetic flux concentrator to channel and/or concentrate magnetic flux of a magnetic field toward the magnetic sensor so as to enable the magnetic sensor to sense a magnetic field in a second direction, the second direction being different than the first direction, the magnetic flux concentrator comprising a patterned layer of magnetic material on a substrate.