NMR study has been made on antiferromagnetic α-Mn metal at helium temperature in zero external field. NMR signal of Mn 55 from Site I appears at 199.4 MHz. The signal from Site II consists of two split lines and appears at 151.5 and 144.5 MHz. The signal from Site III has complicated structure and appears in the range from 20 to 35 MHz. The signal from Site IV appears at around 5 MHz. It is concluded that there are two types of magnetic moment on Site II. Except for this point, the results are consistent with the recent neutron diffraction study and support the non-collinear spin configuration. The appearance of two types of moment at Site II is discussed.
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Hideki Yamagata (1972) studied this question.
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