Electrically Detected Magnetic Resonance (EDMR)

Normally Electron Paramagnetic Resonance is measured by measuring the absorption of the microwaves. In some conducting samples the absorption of resonant spins can be measured by detecting a change in electrical conduction when resonant microwaves are applied to the sample. This technique is then typically referred to as Electrically Detected Magnetic Resonance (EDMR). A necessary ingredient is a spin dependent conduction pathway, but it can greatly enhance the sensitivity, and single spin detection has been observed in select cases. The high electron spin polarization and a setup without resonator make this technique especially efficient at high frequencies and fields.