MONOLITHIC SPINTRONIC OLED MAGNETOMETER

Magnetometers are used for a variety of sensor applications and various magnetometer concepts, each with different advantages and disadvantages. Currently available, low-cost room temperature magnetometers, however, must be calibrated for any environmental conditions under which they are operated. Most magnetometers are calibrated to account for a small range of normal operating conditions (e.g. a temperature range) only.

This monolithic organic thin-film semiconductor magnetometer eliminates the need for calibration. A dielectric thin-film provides electrical and thermal insulation between a thin-film wire, capable of inducing an AC magnetic field, and a layer stack in which spin-dependent electronic transition rates govern a measurable current. Magnetic resonance of the frequency of the AC field and the Larmor frequency of charge carriers in the thin-film device change the spin-dependent transition rates and thus, the electric current. Small electric current changes, indicative of magnetic resonance, reveal the magnetic field applied to the device.