Transverse relaxation of nuclear spin system in lithium-zinc ferrite at different excitation powers

The paper presents the results of experiments on the study of the transverse relaxation of the magnetic moments of 57Fe nuclei when the echo signals are excited by radio frequency pulses of various powers. As a sample lithium-zinc ferrite was used. The investigation was carried out according to a standard scheme of non-steady nuclear magnetic resonance observation in magnetically ordered materials: without using an external permanent magnetic field and with a reduced pulse power сompared to conventional case. Measurements were performed at room temperature. It is established that in a sufficiently wide range of capacities, the time of transverse relaxation remains approximately constant, changing slightly only with a significant decrease in the level of excitation. It is shown that the behavior of the spin echo signal is related to the specifics of observing nuclear magnetic resonance in domain boundaries.