The peculiarities of magnetization processes in layered high- temperature superconductors with ferromagnetic defects under applying of transport current and external magnetic field

3rd International Conference on Mathematical Modeling in Physical Sciences

物理学;数学

Kashurnikov, V.A.^1 ; Maksimova, A.N.^1 ; Rudnev, I.A.^1

National Research Nuclear University, Moscow Engineering Physics Institute, Moscow, Russia^1

关键词: DC magnetic field;    External magnetic field;    H-T phase diagram;    I;    V curve;    Magnetic particle;    Transport currents;    Voltage-current characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/574/1/012129/pdf
DOI  :  10.1088/1742-6596/574/1/012129

来源: IOP

【 摘 要 】

The Monte-Carlo method was used for study of magnetization processes in 2D layered high temperature superconductors (HTSC) with internal ferromagnetic defects. The magnetization was treated under application of transport current and external dc magnetic field. The voltage-current characteristics (I-V curve) were calculated in presence of external dc magnetic field. A novel S-type I-V curve of the superconductor/ferromagnet system in external magnetic field was demonstrated. It was shown that the S-type nonlinearity is due to the local reversal magnetization of magnetic particles by the field of vortices. The H-T phase diagram which demonstrates the region of existence I-V curve nonlinearity was obtained. The conditions for electromagnetic generation at the region of nonlinearity were found and the frequency of such a generation was estimated.