Its presence in a system can induce precession.
The magnetization of the free layer of a ferromagnet is given as the sum of four forms of this quantity, including the Slonczewski form and the Landau-Lifshitz form. The measurement of this quantity allowed R. A. Beth to conclude that Laguerre-Gaussian lasers conferred a related quantity to light. The maximum of this quantity over field strength gives the magnetic moment in the Kennelly approach, and Liouville's generalization of Euler's equations to nonrigid motion gives this quantity for each of three axes. Its presence in a system can induce precession. For 10 points, name this quantity, equal to the cross product of force and lever arm, which is the time derivative of angular momentum and the rotational analogue of force.
The magnetization of the free layer of a ferromagnet is given as the sum of four forms of this quantity, including the Slonczewski form and the Landau-Lifshitz form.
{torque}