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Nonlinear and multiquantum effects in dual-frequency EPR experiment: the intensities of sideband resonances
Authors:P B Sczaniecki
Institution:1. Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, 60-179, Poznań, Poland
Abstract:Two microwave frequencies ω1 and ω2 simultaneously exciting a paramagnetic spin probe near the resonance condition ω1 = γB 0 effect a pattern of resonances occurring at multiples of the difference frequency δ = ω2 ? ω1. Their intensities, measured in the absorption or dispersion mode in the magnetic field-sweep experiment, decrease rapidly as the distance from the centerband increases. Numerically solved Bloch equations are used to discuss the intensities of the transverse components of magnetization up to seven, harmonics of the frequency difference δ. In conclusion, it is suggested that the experimental investigation of these patterns can be used for the purpose of a continuous-wave monitoring the relaxation rates of spin probes.
Keywords:
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