We have investigated the variation of the critical temperature $\left(T_c\right)$ in the NbN/Gd/NbN system in the dirty limit under the cumulative effect of ferromagnetic thickness $\left(d_f\right)$ and the SF interface transparency by solving the linearized Usadel equations analytically in the Matsubara Greens function technique and the following trends in the $T_c\left(d_f\right)$ curves were observed. (a) Non-monotonic decrease of $T_c$ with the ferromagnetic thickness $d_f$ for higher interface transparency. (b) Reentrant behavior of $T_c$ for smaller values of the interface transparency. (c) Monotonous behavior of $T_c$ for extremely low interface transparency. It was also found that the transition into the $\pi -$phase in NBN/Gd/NbN system with small interface transparency is unrelated to the oscillations of the superconducting critical temperature in the F-layer. The critical temperature has a non-monotonous dependency when it switches between $0-\pi$ phases.

我们研究了临界温度的变化$\left({吨}_C\right)$在 NbN/Gd/NbN 系统中的脏极限下铁磁厚度的累积效应$\left(d_F\right)$和SF界面透明度通过在 Matsubara Greens 函数技术中解析求解线性化 Usadel 方程以及以下趋势${吨}_C\left(d_F\right)$观察到曲线。(a) 非单调下降${吨}_C$具有铁磁厚度$d_F$以获得更高的界面透明度。(b) 的重入行为${吨}_C$对于较小的界面透明度值。(c) 单调的行为${吨}_C$用于极低的界面透明度。还发现过渡到$\pi -$界面透明度小的NBN/Gd/NbN体系中的相与F层中超导临界温度的振荡无关。临界温度在两者之间切换时具有非单调依赖性$0-\pi$阶段。