Experimental confirmation of the formation of a spin polariton in dilute solutions of paramagnetic particles

Abstract

Spin exchange during random bimolecular collisions of paramagnetic particles in dilute solutions leads to a surprising effect: collective modes of motion of the average values ​​of the transverse magnetization components...

Experimental Observation of a Peculiar Effect in Electron Paramagnetic Resonance Spectra for Nitroxides Undergoing Fast Spin Exchange: Emission

“…A brief summary of Salikhov’s principle findings is given in the Supporting Information, SI, of ref . In his latest work, he went on to include H 1 in the kinetic equations for I = 1/2 thereby breathing new life into subject that was thought to be complete, invoking terms like “peculiar” and “spin polaritons.” One of those peculiarities has been verified qualitatively recently. , Here, we present data in the limit of H 1 → 0; however, we employ Salikhov’s theory with an eye to the future where interesting features appear as the spectra are saturated. Spin modes in the Phantom regime are simpler than those in the normal regime, consisting only of two absorptions, ABS­(N P ) and ABS­(P), the narrow and Phantom modes, respectively as may be appreciated in Figure .…”

“…One of those peculiarities has been verified qualitatively recently. 1,18 Here, we present data in the limit of H 1 → 0; however, we employ Salikhov's theory 2 with an eye to the future where interesting features appear as the spectra are saturated. Spin modes in the Phantom regime are simpler than those in the normal regime, consisting only of two absorptions, ABS(N P ) and ABS(P), the narrow and Phantom modes, respectively as may be appreciated in Figure 2.…”