Induction Method for Electron Spin Resonance Spectrometry

An apparatus is described which uses the unique properties of an H-plane microwave junction to observe electron spin resonance in a manner analogous to the Bloch induction method. The theoretical sensitivity of this technique is expressed as a function of the parameters of the junction and the minimum observable number of unpaired electron spins. This method is compared with cavity techniques and is found to yield high sensitivity for small volume samples.