Abstract
With the hope of obtaining information about the canted spin structure which has been proposed by Nakagawa et al. on the basis of their neutron diffraction study, the Mn 55 NMR frequency has been measured as a function of external magnetic field. A value of (-1.03±0.03) MHz/kOe has been obtained for d ν/ d H at 77°K. This value seems to suggest that β 1 -MnZn has a simple ferromagnetic spin structure, if it is not the case that the hyperfine field at the Mn 55 nucleus lies accidentally along the ferromagnetic component due to the effects of the neighboring Mn moments. The results of the observation of the Zn 67 NMR is appended. The hyperfine field at the Zn 67 nucleus is -270.9 kOe at 4.2°K.
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