Resistivity superconducting transition in single-crystalline Cd0.95Ni0.05Sb system consisting of non-superconducting CdSb and NiSb phases |
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| Institution: | 1. Belgorod State University, Belgorod 308015, Russian Federation;2. Belgorod State Technological University named after V.G. Shukhov, Belgorod 308012, Russian Federation;3. Southwest State University, Kursk 305040, Russian Federation;4. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow 119991, Russian Federation;1. Thin Film Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, M.S., India;2. Department of Physics, Yeungnam University, Gyeongsan, Gyeongbuk-38541, South Korea;3. Chemical Engineering and Process Development Division, National Chemical Laboratory, Dr. Homi Bhabha Road, Pune 411008, M.S., India;4. Department of Physics, Sadguru Gadage Maharaj College, Karad 415124, Dist- Satara, M.S., India;5. School of Nanoscience and Technology, Shivaji University, Kolhapur 416004, M. S., India;1. Department of Mathematics The Islamia University of Bahawalpur, Bahawalpur, Pakistan;2. Department of Physics, Istanbul University, Istanbul Turkey;1. Department of Mathematics, University of Gujrat, 50700, Pakistan.;2. Future Technology Research Center, National Yunlin University of Science and Technology, 123 University Road, Section 3, Douliou, Yunlin 64002, Taiwan, R.O.C.;3. Department of Mathematics, COMSATS University Islamabad, Attock Campus, Attock 43600, Pakistan;1. ITA - Instituto Tecnológico de Aeronáutica - Departamento de Física, São José dos Campos, 12228-900, São Paulo, Brazil;2. Universidade de São Paulo, Instituto de Astronomia, Geofísica e Ciências Atmosféricas, Rua do Matão 1226, Cidade Universitária, São Paulo 05508-090, SP, Brazil;3. Universidade Estadual Paulista (Unesp), Campus Experimental de Itapeva - R. Geraldo Alckmin 519, Itapeva, 18409-010, SP, Brazil;4. Departamento de Física, Instituto de Ciências Ambientais, Químicas e Farmacêuticas (ICAQF), Universidade Federal de São Paulo - UNIFESP, Rua São Nicolau no.210, Centro, Diadema, 09913-030, SP, Brazil;1. State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science and Engineering, Tianjin University, Tianjin, 300072, China;2. State Key Lab of Hydraulic Engineering Simulation and Safety, School of Civil Engineering, Tianjin University, Tianjin, 300072, China |
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| Abstract: | Resistivity superconducting transition has been for the first time found in single crystal of two-component 0.95(CdSb)–0.05(NiSb) system. End members of the system are not superconductors under normal conditions. Insulating behavior in temperature dependence of the electrical resistivity, which is due to hopping conductivity, precedes the transition. The resistivity superconducting transition is rather broad, since at cooling down the electrical resistivity starts to fall at 10.5 K, whereas zero resistivity is reached only at ~2.3 K. Longitudinal magnetic field gradually depresses superconductivity and shifts the superconducting transition to lower temperatures. Under magnetic field above 0.5 T, superconductivity is totally destroyed. Main features observed in the resistivity superconducting transition, including its unusually big width and insulating electrical behavior above the transition, can be related to inhomogeneity of the single crystal studied. According to XRD and SEM examinations, the single crystal consists of major CdSb phase and minor NiSb phase. The NiSb phase forms inhomogeneities in the CdSb matrix. Micro-sized needle-like NiSb crystals and nano-sized Ni1-xSbx clusters can be considered as typical inhomogeneities. |
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