Nuclear spin-lattice relaxation of Co nuclei in a Fe/Co multilayer at low temperatures
Abstract
Low-temperature nuclear orientation has been applied to the study of the nuclear spin-lattice relaxation (SLR) of60Co in the Co phase of a single-crystalline [Co(21 Å) /Fe(24 Å)]25 multilayer. The Co layers previously were shown to follow the bcc structure of Fe. The hyperfine field (B hf ) distribution was studied by NMR on59Co in the same sample. We applied the thermal cycling (TC) method at temperatures around 9 mK in the external magnetic field (B ext ) range 0.05-1 T to determine the SLR, which was found for Co in bcc Co to be about seven times faster than the SLR of Co in Fe. Moreover, the (B ext ) dependence of the SLR as observed for impurities in Fe and Co in fcc Co was not found.
- Publication:
-
Czechoslovak Journal of Physics Supplement
- Pub Date:
- April 1996
- DOI:
- 10.1007/BF02571082
- Bibcode:
- 1996CzJPS..46.2181T