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https://doi.org/10.1098/rspa.1932.0034
Copy DOIPublication Date: Feb 1, 1932 | |
Citations: 11 |
In a previous paper (referred to in what follows as I) a method for measuring the gyromagnetic ratio for paramagnetic substances was described, together with the results of experiments on a strongly paramagnetic substance, dysprosium oxide. The ratio of the angular momentum produced by a given change of magnetic moment gives the Landé splitting factor, which in the case of the Dy +++ ion was found to be 1·28. This indicates that the magnetic moment is composed of both orbital and spin contributions, and agrees well with the theoretical value of 1·33 for the state 6 H 15/2 deduced by Hund as being the most probable for this ion. In a further contribution (II), the apparatus was used for similar measurements on some salts of the iron group, an account being given of the means used to obtain the necessary increased sensitivity. The results, taken as a whole, show that the only tenable view advanced to explain the magnetic susceptibilities of ions of this group is that of Stoner, i. e ., that the spin and orbital moments are quantised separately relative to the field axis, and further, the orbital moment may be wholly or partially suppressed by the fields of neighbouring ions. The present paper deals with measurements on some oxides of the rare earth group. The apparatus used was identical with that designed for increased sensitivity and described in II, so that no further description is necessary.
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