Abstract
The 59Co nuclear magnetic resonance was observed in Gd2(Co1-xFex)17 with the Th2Zn17-type structure of x=0, 0.03, 0.1, 0.2 and 0.7 using the spin-echo method at 4.2K. The composition dependence of the observed spectra corresponds to the variation of the easy direction of magnetisation. The resonance, which was observed at 78 MHz when x=0 and which was attributed to the 6c sites, disappeared at about x=0.1. The dependence of the relative intensity of the spectral lines on x is compatible with the preferential occupancy of particular crystallographic sites by Fe. In Gd2Co17, quadrupole splittings were observed by the steady-state method at 77K.

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