Спин-волновой резонанс в обменно-связанных трехслойных FeNi/Cu/FeNi планарных структурах

The spectrums of standing exchange spin waves into magnetic sandwich Ni80Fe20/Cu(tCu)/Ni80Fe20 were studied by spin-wave resonance method. The layer of diamagnetic Cu depending on its thickness tCu provided both positive and negative exchange interaction between ferromagnetic layers. It was shown that spin waves modes of SWR spectra which are described by well-known relation Hres(n)~n^2 are standing acoustic exchange spin oscillations of individual ferromagnetic layers, regardless of a sign of interlayer exchange couple. It was detected that spin modes which are optical satellites of acoustic SWR peaks are described by the dependence of the resonance field Hres(n)~n^(5/2) or Hres(n)~n^2 depending on the boundary conditions established on inner interfaces.

Magnetic and Ferromagnetic Resonance Studies in Amorphous Co–Zr Films

The magnetic properties of amorphous Co[Formula: see text]Zrx films prepared by co-evaporation have been studied by means of vibrating sample magnetometry and ferromagnetic resonance. The temperature dependence of spontaneous magnetization [Formula: see text] in the low temperature range can be described using Bloch’s law. In addition, the spin wave stiffness constant, the distance between nearest magnetic atoms and the exchange interaction between cobalt and its nearest neighbors were calculated from the experimental results for [Formula: see text]. Spin-wave resonance modes were obtained and the change of the resonant field as a function of the mode number [Formula: see text] obeys the so-called [Formula: see text] law perpendicular to the film plane at 300[Formula: see text]K.