Electron Paramagnetic Resonance Under Conditions of Resonant Spin Amplification

Student: Korotneva Alexandra

Supervisor:

Educational Programme: Physics (Bachelor)

Year of Graduation: 2021

The Larmor precession accrues when the magnetic field is applied on the electron spin. Application of additional oscillating radio frequency (RF) orthogonal magnetic field can result in electron spin (paramagnetic) resonance (ESR) in the case when both Larmor and radio frequencies are close. Another resonant effect, takes place when the Larmor frequency is close to the frequency of optical pumping, is called resonant spin amplification (RSA). Combining these two resonances we were able to observe double resonance for spin polarization in a constant magnetic field. Notably, the magnitude of the effect turned out to be quadratic with the applied amplitude of the RF field applied, unlike an ordinary ESR, where this dependence is linear.

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