This presentation at ACCC10 (the 10th Asian Conference on Coordination Chemistry) describes the exchange-field model and its application to probe the quantum-coherent properties of single atoms, transition-metal containing molecules and organic compounds. The relevant references can be found below.

Introduction to the exchange-field model:
Contrasting exchange-field and spin-transfer torque driving mechanisms in all-electric electron spin resonance

Application of the exchange-field model to individual Ti atoms and FePc molecules
Controlling the Exchange Field of Surface Spin Impurities via DC Voltages

Sub-atomic resolution imaging of small polycyclic aromatic hydrocarbons:
Magnetic Resonance Imaging of Single Organic Radicals with Sub-Molecular Resolution