Low temperature superconducting phase of the ternary pnictide SrPd2Sb2 with CaBe2Ge2-type structure

TMU International Symposium on "New Quantum Phases Emerging from Novel Crystal Structure"

Kase, N.^1 ; Suzuki, H.^1 ; Tsukamoto, T.^2 ; Nakano, T.^1 ; Takeda, N.^2

Graduate School of Science and Technology, Niigata University, Niigata

950-2102, Japan^1

Department of Materials Science and Technology, Niigata University, Niigata

950-2102, Japan^2

关键词: Low temperatures;    Pnictides;    Superconducting phase;    Superconducting transitions;    Type structures;    Upper critical fields;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/683/1/012034/pdf
DOI  :  10.1088/1742-6596/683/1/012034

来源: IOP

【 摘 要 】

We find that low temperature superconducting phase (LSP) of SrPd2Sb2with the CaBe2Ge2-type structure at Tc= 1.4 K. Superconducting transition is found at Tc= 1.4 K in electrical resistivity ρ(T). Specific heat C(T) shows a clear anomaly at Tc= 1.2 K, which shows that superconductivity is of bulk nature. From ρ(T) in several magnetic fields, the upper critical field μ0Hc2(0) is estimated to be 36 mT, which is strongly suppressed, and is 16.7 times smaller than that of 1.9 K phase.