NMR Study of Antiferromagnetic Chromium Alloys

NMR studies in antiferromagnetic Cr alloys were performed. (1) NMR signal of Co 59 in antiferromagnetic C r Co alloys was observed at about 66 MHz which agrees with the value obtained by Mössbauer experiment. With increasing Co concentration there appeared satellite lines at 45 and 24 MHz due to Co atoms having one and two Co atoms in their nearest neighbours, respectively. (2) The hyperfine fields at V 51 and Mn 55 were measured in antiferromagnetic C r VMn ternary system. The result suggests that almost the same order of magnitude of the spin polarization exists at V atoms as well as at Mn atoms. The rigid band approximation does not hold in high concentration range. (3) V 51 NMR was observed in C r V alloys in SDW state in external field.