An Experiment on Molecular Gyroscopic Action

J W Fisher
1921 Proceedings of the Physical Society of London  
Starting from tlie inference, pointed out by 0. W. Ricliardsoii on the basis of electron theory, that the magnetization of a substance implies a moment of momentum about the axis of magnetization, the consequences of applying a rotating magnetic field to a specimen of magnetic inaterial are analysed. It is shown that magnetization in a direction transverse to the plane of the rotating field should result, in sense related t o the direction of rotation of the field by the lefthand screw rule ;
more » ... hand screw rule ; and proportional in intensity to the first power of the angular velocity of the field arid the susceptibility of tlie material. Experimental tests were made, using a magnetometer, but without success, disturbing effects having not as yet been eliminated. ACCORDING to the electron theory the niagiictization of a substance implies a moment of momentuiii about the asis of magnetization due to a resultant rotation of the electrons in one sense. This consequence was first pointed out, in connection with the electron theory, by 0. R. Richardson* who found for the moment of momentuni U per unit volume, taking account of both positivc and negative electrons, t h e value where 11 and l i t are the masses of the positive and negative electrons respectively, E and e their charges, d and a the average values of the projections of the areas of
doi:10.1088/1478-7814/34/1/336 fatcat:ux7grgg3dbfdhoxpsxcudecvum