TY  - JOUR
T1  - NMR Spin Echo Study of Domain Wall Pinning in Magnets in Combination with an Additional Magnetic Video-Pulse
AU  - Gavashelı, Tsisana
AU  - Mamnıashvılı, Grigor
AU  - Gegechkorı, Tatiana
PY  - 2023
DA  - September
DO  - 10.55549/epstem.1351013
JF  - The Eurasia Proceedings of Science Technology Engineering and Mathematics
JO  - EPSTEM
PB  - ISRES Publishing
WT  - DergiPark
SN  - 2602-3199
SP  - 348
EP  - 358
VL  - 22
LA  - en
AB  - NMR spin echo at application of an additional magnetic video-pulse is a convenient method to study the domain wall pinning in magnetic materials. Domain wall (DW) pinning is the critical amplitude of the magnetic video-pulse (MVP) below which the DW is fixed. For its assessment, two alternative NMR methods were chosen. In the first case, the pinning of DW was measured by the action of MVP on a two-pulse echo signal, and in the second one, the pinning was measured at the combined action of MVP and radiofrequency (RF) pulses on the nuclear spin system in DW during the process of formation a single-pulse echo, by means of generation of the so-called magnetic echo signal. DW pinning was studied by these two methods in magnets (lithium-zinc ferrite and cobalt micropowder samples).
KW  - Nuclear spin echo
KW  - Magnetic video-pulse
KW  - Two-pulse echo
KW  - Domain wall mobility
KW  - Pinning.
CR  - Bartran, D., & Bourne, H. (1973). Domain wall velocity and interrupted pulse experiments. IEEE Transactions on Magnetics, 9(4), 609-613.
CR  - Doroshev, V. D., Klochan, V. A., Kovtun, N. M., & Seleznev, V. N. (1972). The effect of dipole and anisotropic hyperfine fields on NMR of Fe57 in lithium ferrite Li0.5Fe2,5O4. Physica Status Solidi A, 9(2), 679-689.
CR  - Galt, J. K. (1954). Motion of individual domain walls in a nickel-iron ferrite. Bell Labs Technical Journal, 33(5), 1023-1054.
UR  - https://doi.org/10.55549/epstem.1351013
L1  - https://dergipark.org.tr/en/download/article-file/3366901
ER  -