Stochastic oscillations of magnetic flux in the toroid sample of lead-doped lanthanum manganite

Abstract

The dynamics of magnetic flux variations in a toroidal sample of the La0.6Pb0.4MnO3 manganite was investigated. Experiments were carried out when the ac magnetic field was applied perpendicular to the dc one. It is shown that under some conditions, several regimes of complex oscillations of magnetic flux can be excited. Evolution of these oscillations as a function of frequency of ac and magnitude of dc magnetic fields was investigated. The signs of existence of the stochastic regime of oscillations were found.

Strong harmonic generation in the chaotic regime of magnetization reversal in lanthanum manganite

“…This configuration permits us to obtain greater variations of magnetization under the application of an ac magnetic field in the presence of a strong dc magnetic field. Stochastic oscillations of magnetic flux with complicated dynamics, which potentially contain harmonics, were observed for this sample [13]. The appearance of such oscillations permits us to assume that such a material can generate the harmonics of a radio-frequency signal.…”