Study Of Domain Wall Pinning In The Rare Earth-Free Permanent Magnets Using Nuclear Magnetic Resonance Method
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The possibility of using of the modified nuclear magnetic resonance (NMR) technique for studying of the domain wall pinning in cobalt micro powders and micro- and nanowires is demonstrated. In particular, information about the domain wall pinning in cobalt nanowires is useful for the fine tuning of the magnetic properties of the rare earth-free magnets.
The pinning force of domain walls was studied by NMR two-pulse echo method in combination with an additional magnetic video-pulse depending on the magnetic video-pulse duration and an outer steady magnetic field value in cobalt micro powders for the first time. The comparative study of the two-pulse echo dependence on the magnetic video-pulse amplitude in cobalt micro- and nanowires was also carried out.