Critical temperature, T _c, and transition width, ΔT _c, are two primary parameters of the superconducting transition. The latter parameter reflects the superconducting state disturbance originating from the thermodynamic fluctuations, atomic disorder, applied magnetic field, the presence of secondary crystalline phases, applied pressure, etc. Recently, Hirsch and Marsiglio (2021 Phys. Rev. B 103 134505, doi: 10.1103/PhysRevB.103.134505) performed an analysis of the transition width in several near-room-temperature superconductors and reported that the reduced transition width, ΔT _c/T _c, in these materials does not follow the conventional trend of transition width broadening in applied magnetic field observed in low- and high-T _c superconductors. Here, we present a thorough mathematical analysis of the magnetoresistive data, R(T, B), for the high-entropy alloy (ScZrNb)_0.65[RhPd]_0.35 and hydrogen-rich superconductors of Im-3m-H₃S, C2/m-LaH₁₀ and P6₃ /mmc-CeH₉. We found that the reduced transition width, ΔT _c/T _c, in these materials follows a conventional broadening trend in applied magnetic field.

临界温度T _c和转变宽度 Δ T _c是超导转变的两个主要参数。后一个参数反映了由热力学波动、原子无序、外加磁场、二次晶相的存在、外加压力等引起的超导状态扰动。 最近，Hirsch and Marsiglio (2021 Phys. Rev. B 103 134505, doi: 10.1103/PhysRevB.103.134505) 对几种接近室温的超导体的跃迁宽度进行了分析，并报告了降低的跃迁宽度 Δ T _c / T _c，在这些材料中，不遵循在低和高T _c超导体中观察到的外加磁场中过渡宽度加宽的传统趋势。在这里，我们对高熵合金 (ScZrNb) _0.65 [RhPd] _0.35和Im- 3 m -H ₃ S、C的富氢超导体的磁阻数据R ( T, B ) 进行了全面的数学分析2 /m -LaH ₁₀和P 6 ₃ /mmc -CeH ₉。我们发现减小的过渡宽度 Δ T _c / T _c，在这些材料中遵循外加磁场的常规加宽趋势。