THE COMPARATIVE NMR STUDY OF DOMAIN WALL PINNING AND MOBILITY IN MAGNETS UNDER THE ACTION OF AN ADDITIONAL MAGNETIC VIDEO-PULSE


A comparative study of the pinning and mobility of domain walls in cobalt nano-and micropowders and lithium ferrite has been carried out under the action of a magnetic video-pulse applied between two radio-frequency pulses on the two-pulse echo and in the case of the combined action of the magnetic video-pulse and radio-frequency pulse, leading to the formation of a stimulated magnetic echo. A correlation is shown between the results of determining the pinning force and domain walls mobility by these two methods, which allows one to use these alternative methods for measuring the domain wall pinning force and mobility in magnets.