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The unidirectional anisotropy and uniaxial anisotropy in exchange bias systems determine the effective field that governs magnetization precession, which is critical to magnetic applications. Research has found that a misalignment between unidirectional and uniaxial anisotropies may exist, i.e., non-collinear anisotropy, where the intrinsic mechanism and contributing factors are poorly reported. In this work, exchange-biased NiFe/NiO bilayers were fabricated by using magnetron sputtering. We investigated the effects of different annealing temperatures on the non-collinear anisotropy of the NiFe/NiO bilayers by measuring the in-plane angular dependence of the magnetic hysteresis loops and the ferromagnetic resonance. We found that the non-collinear angle β varied gradually from 0° to 45° with the variation in annealing temperature, which showed an asymmetric magnetization phenomenon. The competition between unidirectional and uniaxial anisotropy and the interfacial magnetic frustration play a major role in the asymmetric reversal phenomena in an antiferromagnet/ferromagnet system. Our results provide insight into the exchange-biased field and promote its application in spintronic devices.

This paper proposes a parallel algorithm of the electromagnetic electromechanical group decoupling based on the electromechanical electromagnetic dual master control, including the hybrid simulation architecture of the group decoupling including the electromechanical transient interface, the data transmission of the electromechanical electromagnetic hybrid simulation, and the corresponding network splitting method, the generation scheme of the electromagnetic subnet group and the master control scheme. The new algorithm can greatly improve the parallel computing efficiency of hybrid simulation and meet the requirements of accuracy. By the realization of the parallel algorithm of the electromagnetic electromechanical group decoupling based on the electromagnetic master control, the hybrid simulation performance of ADPSS is improved, which can support the hybrid simulation of large-scale AC and DC power grid.

Based on the large power grid simulation and the existing security prevention and control mode, this paper further integrates the multi-step transient hybrid simulation architecture computing technology to research the high-performance analysis and situational awareness simulation technology of interconnected AC / DC large power grid security and stability characteristics. So as to realize the “panoramic situational awareness, wide area coordinated control, flexible and efficient service” of large power grid, and improve the super large scale power grid Comprehensive security defense and intelligent monitoring level of panoramic, multi-dimensional and three-dimensional.