Macroscopic quantum beats in a molecular magnet loosely fastened to the matrix

It is shown that, in the presence of sound waves, rotational states play an important role in the spin oscillation of a free nanomagnet. Employing the rotating wave approximation and perturbation theory, we compute the magnetization dynamics generated by ultrasound and discuss optimal conditions under which this novel quantum effect can be observed in a rotating single-molecule magnet. Copyright EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013