论文标题
高渗透合金型过渡金属锆石（Fe，Co，Ni，Cu，Ga）Zr2的超导性
Superconductivity of high-entropy-alloy-type transition-metal zirconide (Fe,Co,Ni,Cu,Ga)Zr2
论文作者
论文摘要
We synthesized a new high-entropy-alloy-type (HEA-type) superconductor (Fe,Co,Ni,Cu,Ga)Zr2 with a Tc of 2.9 K. The EDX analyses revealed that the actual composition of the transition-metal site (Tr-site) is Tr = Fe0.18Co0.18Ni0.16Cu0.25Ga0.23, which gives the TR位点的混合ΔSmix= 1.60R的配置熵。中子粉末衍射显示样品具有四方Cual2型（空间组：＃140）。单调的晶格常数随温度降低而降低，但是C的晶格常数不会表现出明显的收缩。 TR和ZR位点的各向同性位移参数都大，这可能是由Heatype TR位点引起的。 UISO对两个地点的温度依赖性较小，还表明（Fe，Co，Ni，Cu，Ga）Zr2中存在局部结构障碍。从电阻率，磁化率和特定的热量测量值中，确认了大量超导性。
We synthesized a new high-entropy-alloy-type (HEA-type) superconductor (Fe,Co,Ni,Cu,Ga)Zr2 with a Tc of 2.9 K. The EDX analyses revealed that the actual composition of the transition-metal site (Tr-site) is Tr = Fe0.18Co0.18Ni0.16Cu0.25Ga0.23, which gives the configurational entropy of mixing ΔSmix = 1.60R for the Tr site. Neutron powder diffraction revealed that the sample has a tetragonal CuAl2-type (space group: #140). The lattice constant of a monotonically decreases with decreasing temperature, but the lattice constant of c does not exhibit a clear shrinkage. Isotropic displacement parameter for both the Tr and Zr sites are large, which is probably caused by the HEA-type Tr site. The small temperature dependences of Uiso for both sites also indicate the presence of the local structural disorder in (Fe,Co,Ni,Cu,Ga)Zr2. From electrical resistivity, magnetic susceptibility, and specific heat measurements, bulk superconductivity was confirmed.
