Functional dependence and quasiperiodicity in the spatiotemporal dynamics of yttrium iron garnet films - art. no. 016210

When thin films of yttrium iron garnet (YIG) are placed in a magnetic field and:driven at microwave (rf) frequencies, nonlinear interactions within th e material cause the normal microwave spin precession to be modulated at lo wer frequencies. We measure these lower frequency (kHz) signals at two spat ially separated locations on the MG film and use linear and nonlinear analy sis to study the functional dependence of the spin dynamics at one location on the spin dynamics at the other location. We see dynamical states where nonlinear analysis can detect a functional dependence that the linear analy sis fails to reveal.