The magnetization properties of the endohedral cluster superconductor Mo₈Ga₄₁ are studied by sensitive Hall-probe magnetometry. The temperature dependence of the lower critical magnetic field H _c1 is obtained and compared to theoretical models accounting for single-gap and two-gap superconductivity. Data can be described by both models with minor differences. These results are confronted with our previous measurements which evidence that the system is inherently single-gap s-wave superconductor but minor additional phases are present also in seemingly perfect samples. We discuss how presence of such additional phases with varying size of the penetration depth and H _c1 field is reflected in magnetization measurements which could lead to misinterpretation of the multigap superconductivity in Mo₈Ga₄₁.

通过敏感霍尔探针磁强计研究了内面簇超导体Mo ₈ Ga ₄₁的磁化性质。获得了较低临界磁场H _{c 1}的温度依赖性，并将其与考虑了单间隙和两间隙超导性的理论模型进行了比较。两种模型都可以描述数据，但差异很小。这些结果与我们之前的测量结果相吻合，这些证据表明该系统本质上是单间隙s波超导体，但在看起来很完美的样品中也存在少量的附加相。我们讨论了如何以不同的穿透深度和H _{c 1}大小存在这些附加相 磁场反映在磁化测量中，这可能导致对Mo ₈ Ga _41中多能隙超导性的误解。