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Spin Wave (SW) has attracted great interest as information carrier in the past decades. Information transmission and processing between devices is achieved by collective precessional motion of magnetization without charge transfer, which enables lower energy consumption. In this paper, we perform several micromagnetic simulations to excite propagating spin wave and find that smaller external magnetic field can excite spin wave with shorter wavelength. A proper external magnetic(1800–2000mT) can excite spin wave with strong intensity for long-distance propagation. These findings will provide guideline in spin wave based logic devices design.

The spin torque nano-oscillator (STNO) with out of film plane fixed layer magnetization, namely the tilted-polarizer spin torque nano-oscillator (TP-STNO), has the advantage of microwave generation without the help of a magnetic field, which makes it promising to be integrated into a chip. In this paper, we present a thermal stability study of TP-STNO by macrospin modeling, in which the thermal noise is induced into the H eff of the Landau-Liftshitz-Gilbert-Slonczewski equation in the form of a stochastic magnetic field. The TP-STNO with different tilted angles is studied by numerical simulations based on the macrospin model and nonlinear system theory. Depending on the analysis of Lyapunov exponents as a function of drive current density in the room temperature range, we obtain the drive current density ranges in which TP-STNO can oscillate stably in the presence of thermal noise. These quantified results are essential during the practical usage of TP-STNO.