Measurement of Electronic Susceptibilities by Means of Nuclear Resonance Absorption

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Abstract
The proton nuclear magnetic resonance is observed in two crossed capillary tubes embedded in a paramagnetic material in a constant external field. The resonance frequencies from the two capillaries depend on the respective demagnetizing factors. For Mn2O3 the two resonance lines are separated by 13.0 kc at 22.3 Mc, giving a mass susceptibility of 65×10−6 cgs, in agreement with values obtained by other methods. For a magnetic field homogeneity of about one part in 107 over the sample, the ultimate sensitivity of the method would be 10−7 to 10−8 susceptibility unit. Measurements can be made at low temperatures.

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