Abstract #1528
Amplitude-modulated continuous wave excitation
Kelvin J. Layton 1 , Bahman Tahayori 1 , James Korte 1 , Iven M. Y. Mareels 1 , Peter M. Farrell 1 , and Leigh A. Johnston 1
1
Department of Electrical and Electronic
Engineering, The University of Melbourne, Melbourne,
Victoria, Australia
The response of the magnetization to amplitude-modulated
continuous wave RF excitation is investigated with
theory and experiments. Proof-of-concept measurements of
the steady-state magnetization waveform demonstrate
substantial frequency components at harmonics of the
modulation frequency, emphasizing the nonlinear nature
of the spin system. Experiments are in excellent
agreement with theoretical expressions derived from the
Bloch equations. Furthermore, experiments show that the
steady-state magnetization is relatively large when the
amplitude of the field matches the modulation frequency,
establishing a secondary resonance condition not
previously observed in magnetic resonance systems.
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