We report results of specific heat and muon spin relaxation (μSR) measurements on a polycrystalline sample of Pr₃Cr_10−xN₁₁, which shows superconducting state below T_c = 5.25 K, a large upper critical field H_c2 ~ 20 T and a residual Sommerfeld coefficient γ₀. The field dependence of γ₀(H) resembles γ of the U-based superconductors UTe₂ and URhGe at low temperatures. The temperature-dependent superfluid density measured by transverse-field μSR experiments is consistent with a p-wave pairing symmetry. ZF-μSR experiment suggests a time-reversal symmetry broken superconducting transition, and temperature-independent spin fluctuations at low temperatures are revealed by LF-μSR experiments. These results indicate that Pr₃Cr_10−xN₁₁ is a candidate of p-wave superconductor which breaks time-reversal symmetry.

_{我们报告了 Pr 3} Cr _{10− x} N ₁₁多晶样品的比热和μ子自旋弛豫 ( μ SR) 测量结果，该样品显示出低于T _c = 5.25 K的超导状态 ，较大的上临界场H _c2  ~ 20 T和残余索末菲系数γ ₀。γ ₀ ( H )的场依赖性类似于低温下U 基超导体 UTe _{2和 URhGe 的}γ 。通过横向场μ SR 实验测量的温度依赖性超流体密度与p波配对对称性一致。ZF- μSR实验表明时间反转对称性被破坏的超导转变，并且LF-μSR实验揭示了低温下与温度无关的自旋涨落。这些结果表明Pr ₃ Cr _{10− x} N ₁₁是打破时间反演对称性的p波超导体的候选者。