Since the discovery of the magnetic property of NiMnGa Heusler system, Ni-Mn-based Heusler alloys have attracted because of their capability on technological applications. For instance, they are tunable with their compositions, temperature, magnetic field, etc. These alloys could have martensitic and magnetic transformations around room temperature which makes them a strong candidate especially refrigeration technologies. We present the first-order martensitic transformation, magnetic, and structural properties in selected NiMnX₁₁(X = In, Sn) Heusler alloys. These compositional tuning of the X element became more prominent in thermomagnetization measurements. While NiMnIn₁₁ alloy has martensite start temperature, austenite finish temperature, and Curie temperature at 277, 289, and 310 K, respectively, these temperatures are at 300, 321, and 320 K for NiMnSn₁₁ alloy. All of the martensitic transformations and Curie temperatures have obtained near room temperature. The XRD data of alloys were refined and gave typical structure properties of non-stoichiometric Ni-Mn Heusler as a mixture of L1₀ tetragonal martensite and L2₁-type cubic austenite.

自从发现NiMnGa Heusler系统的磁性以来，Ni-Mn基Heusler合金因其在技术上的应用而备受关注。例如，它们的成分，温度，磁场等均可调节。这些合金在室温附近可能会发生马氏体和磁性转变，这使其成为特别是制冷技术的强大候选者。我们介绍了选定的NiMnX ₁₁（X = In，Sn）Heusler合金的一阶马氏体相变，磁性和结构性能。X元素的这些组成调整在热磁化测量中变得更加突出。而NiMnIn ₁₁合金的马氏体起始温度，奥氏体完成温度和居里温度分别为277、289和310 K，对于NiMnSn ₁₁合金，这些温度分别为300、321和320K 。所有的马氏体转变和居里温度都已接近室温。完善了合金的XRD数据，并给出了L1 ₀四方马氏体和L2 ₁型立方奥氏体的混合物的非化学计量Ni-Mn Heusler的典型结构性能。