Radio-frequency Echoes from Metal Powders
- 1 December 1975
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Physics
- Vol. 53 (23) , 2622-2630
- https://doi.org/10.1139/p75-321
Abstract
Echoes, following an rf pulse sequence, which originate from excitation and refocusing of elastic modes in powders of various metals were observed in a 10–100 MHz frequency range. The echoes from ferromagnetic and normal metals have many identical properties; differences between them are due to different excitation mechanisms. The experimental evidence suggests that in all cases the echo is formed by refocusing of single particle resonance modes.Keywords
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