Self-sustained Maser oscillations of a large magnetization driven by a radiation damping-based electronic feedback

Abergel, Daniel; Louis-Joseph, Alain; Lallemand, Jean-Yves
April 2002
Journal of Chemical Physics;4/22/2002, Vol. 116 Issue 16, p7073
Academic Journal
In this paper, the dynamics of a magnetization undergoing a radiation-damping based feedback radio-frequency field is investigated both theoretically and experimentally. It is shown that due to the presence of T[sub 1] relaxation the evolution equations predict the existence of self-sustained maser pulses. This phenomenon is a consequence of the competition between two different processes, namely, T[sub 1] relaxation and a precession about a magnetization-dependent radio-frequency field. Experiments show the existence of periodic revivals of the free induction decay over unusually long periods of time, on the order of tens of seconds. © 2002 American Institute of Physics.


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