Multiple nuclear spin echo in thin polycrystalline ferromagnetic films |
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Authors: | V O Golub V V Kotov A N Pogorelyi |
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Institution: | (1) Institute of Magnetism, Ukraine Academy of Sciences, 252142 Kiev, Ukraine |
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Abstract: | The formation of multiple nuclear spin echo signals has been studied in thin ferromagnetic polycrystalline films of 3d-metals and their alloys with induced anisotropy at temperatures between 2.2 and 300 K using two-pulse and three-pulse excitation.
A method is proposed for the experimental determination of the contributions made by different mechanisms to the formation
of spin-echo signals in magnets with strongly inhomogeneous Zeeman and quadrupole interactions. It is shown that in ferromagnets
with a high rf field gain at the nucleus, the frequency modulation mechanism has a substantial influence in observations of
nuclear spin-echo signals at nuclei with a high magnetic moment, even at liquid-helium temperatures.
Fiz. Tverd. Tela (St. Petersburg) 40, 1056–1061 (June 1998) |
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