NMR Single-Pulse Echo in Magnets: Fundamental Formation Mechanisms and Potential Applications for Operation of Spin-echo Processors

Abstract

The fundamental mechanisms of single-pulse echo formation in magnets were investigated using lithium ferrite and cobalt as examples. The properties of a single-pulse echo and its secondary signals, as well as the secondary signals of a two-pulse echo of ⁵⁷Fe nuclei in lithium ferrite, were studied and compared with those in cobalt. The experimental results indicate the efficiency of the multiple-pulse mechanism of single-pulse echo formation and its secondary signals in lithium ferrite, as well as in cobalt at low powers of radio-frequency pulses. At radio-frequency powers above a certain threshold value, the single-pulse echo in cobalt is formed through the distortion mechanism of the radio-frequency pulse. A potential application of NMR spin-phenomenon for operation of spin-echo processors was discussed.