Applications of A15 superconductors have received considerable attention, resulting in a large body of reported research work on A15 superconductors. Nonetheless, studies on this material focusing on its superconducting parameters are scarce. This motivates new efforts toward bulk measurements in typical A15 material V${}_3$Ge, which is also the isomorph of V${}_3$Si with a superconducting transition temperature at 17 K. In this study, we determined the superconducting parameters of single-phase V${}_3$Ge crystals, which crystallize in the A15 structure, through measurements of magnetization, magnetic susceptibility, electrical resistivity, and heat capacity. Our results show that the temperature ($T_{\mathrm{c}}$) of its superconducting transition is $6.2\pm 0.4$ K. Moreover, we conducted electrical resistivity and magnetic susceptibility measurements and found the lower and higher critical fields to be 559 Oe and 39.8 kOe, respectively. The Ginzburg–Landau parameter ${\kappa }_{\text{GL}}$ is determined to be 9.78, which is much greater than $1/\sqrt{2}$, implying V${}_3$Ge Type-II superconductor. The Sommerfeld coefficient $\gamma$ in the normal state is determined to be 31.2 mJ/K${}^2$ mol, which is 50$\sim$100 folds higher compared to that in the normal metal, thereby indicating the enhancement of the density of state at the Fermi energy. The Debye temperature $\Theta$ is estimated to be 430 K, and the value of the drastic increase in the specific heat at $T_{\mathrm{c}}$ is approximately 1.33, which is 7$\%$ smaller than the weak coupling limit of 1.43 predicted by the Bardeen–Cooper–Schrieffer (BCS) theory. The electron–phonon coupling constant ${\lambda }_{\mathrm{e}-\text{ph}}$ is 0.61. These values suggest that V${}_3$Ge is a conventional superconductor with s-wave symmetry in the BCS framework, which implies that the high Debye temperature and large density of states at the Fermi energy contribute to the increase in $T_{\mathrm{c}}$ in V₃Ge. The superconducting parameters determined in this study provide guidance for the development of a new metal superconductor with high-$T_{\mathrm{c}}$.

A15超导体的应用受到了相当大的关注，导致大量关于A15超导体的研究工作被报道。尽管如此，针对这种材料的超导参数的研究却很少。这激发了对典型 A15 材料 V 的体积测量的新努力${}_3$Ge，也是 V 的同构型${}_3$Si 的超导转变温度为 17 K。在这项研究中，我们确定了单相 V 的超导参数${}_3$通过测量磁化强度、磁化率、电阻率和热容量，以 A15 结构结晶的 Ge 晶体。我们的结果表明，温度 (${吨}_{\mathrm{C}}$) 的超导跃迁是$6.2\pm 0.4$ K. 此外，我们进行了电阻率和磁化率测量，发现较低和较高的临界场分别为 559 Oe 和 39.8 kOe。金茨堡-朗道参数${\kappa }_{\text{总帐}}$确定为9.78，远大于$1/\sqrt{2}$, 意味着 V${}_3$Ge II 型超导体。索末菲系数$\gamma$正常状态下测定为31.2 mJ/K${}^2$摩尔，即 50$～$与普通金属相比，高出 100 倍，从而表明在费米能量下的状态密度增强。德拜温度$\theta$估计为 430 K，比热急剧增加的值在${吨}_{\mathrm{C}}$约为 1.33，即 7$\%$小于 Bardeen-Cooper-Schrieffer (BCS) 理论预测的 1.43 的弱耦合极限。电子-声子耦合常数${\lambda }_{\mathrm{e}-\text{酸碱度}}$为 0.61。这些值表明 V${}_3$Ge 是 BCS 框架中具有 s 波对称性的传统超导体，这意味着高德拜温度和费米能级处的大状态密度有助于增加${吨}_{\mathrm{C}}$在 V ₃ Ge 中。本研究确定的超导参数为开发具有高超导特性的新型金属超导体提供了指导。${吨}_{\mathrm{C}}$.