ALTERNATIVE IMPLEMENTATION OF THE METHOD OF MAGNETORHEOLOGICAL CONTROL OF THE MAGNETIC SUSCEPTIBILITY OF A PARTICLE

It has been established that a new magnetorheological method of controlling the magnetic susceptibility of a single ferromagnetic particle moving vertically downwards in a liquid in a vessel located between the poles-hemispheres of a magnetometer above the enter-to-center line of the poles provides an eff ect on the particle in addition to the gravitational impact of the magnetic force directed downwards. In this case, the particle velocity becomes undesirably high, and the time it takes to pass through the magnetometer′s executive zone to be very small. Taking into account these circumstances, which complicate the execution of experiments, it is recommended to place the vessel with liquid in another, symmetrical, part of the interpolar region — between the same poles-hemispheres, but below their center-to-center line. Then, because of the purposefully changed direction of the magnetic force to the opposite and correspondingly changed direction of the particle′s movement (upward), the particle′s velocity within the similar execution zone will decrease signifi cantly (and favorably for performing experiments), and the time of this movement will increase. Expressions have been obtained for determining the magnetic susceptibility of a particle performing such a movement.
It has been established that a new magnetorheological method of controlling the magnetic susceptibility of a single ferromagnetic particle moving vertically downwards in a liquid in a vessel located between the poles-hemispheres of a magnetometer above the enter-to-center line of the poles provides an eff ect on the particle in addition to the gravitational impact of the magnetic force directed downwards. In this case, the particle velocity becomes undesirably high, and the time it takes to pass through the magnetometer′s executive zone to be very small. Taking into account these circumstances, which complicate the execution of experiments, it is recommended to place the vessel with liquid in another, symmetrical, part of the interpolar region — between the same poles-hemispheres, but below their center-to-center line. Then, because of the purposefully changed direction of the magnetic force to the opposite and correspondingly changed direction of the particle′s movement (upward), the particle′s velocity within the similar execution zone will decrease signifi cantly (and favorably for performing experiments), and the time of this movement will increase. Expressions have been obtained for determining the magnetic susceptibility of a particle performing such a movement.
Author:  D. A. Sandulyak, A. A. Sandulyak, M. N. Polismakova, V. A. Ershova, A. V. Sandulyak, and A. S. Kharin
Keywords:  single particle, magnetic susceptibility, magnetorheological method, executive zone, constancy of magnetic force factor
Page:  565