caa a22 4500 445380462 CHVBK 20180317143015.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s10948-010-0819-4 doi (NATIONALLICENCE)springer-10.1007/s10948-010-0819-4 Magnetic and Superconducting Properties of Doped and Undoped Double Perovskite Sr2YRuO6 [Elektronische Daten] [S. Rao, J. Srivastava, M. Wu, B. Mok, C. Chen, M. Ling, H.-L. Liu, Y. Chen, J. Ho] We report here SQUID (magnetization) measurements, along with supporting specific heat, Raman, SEM (scanning electron microscope), EDX (energy dispersive X-ray) and XRD (X-ray diffraction) measurements, on Cu-doped and undoped double perovskite $\mathrm{Sr}_{2}^{2+}\mathrm{Y}^{3+}\mathrm{Ru}^{5+}\mathrm{O}_{6}^{2-}$ (abbreviated as SrY2116) system grown as single crystal using high-temperature solution growth technique. These measurements show the undoped system to be a nonmetallic (insulating) spin glass (SG) and the ∼5-30% Cu-doped (i.e. Cu-concentration/(Cu + Ru-concentration) ∼5-30%) system to be a spin glass superconductor (SGSC) with T c (critical temperature) ∼28-31K and superconducting volume fraction, f sc∼2.2-9%. To mention, similar measurements done on undoped and Cu-doped BaY2116 and BaPr2116 systems show for them the same (SG, SGSC) behaviors. However they show a decrease in T c and f sc when diamagnetic Y3+ ions are replaced by Pr3+ spins, presumably due to enhanced internal pair breaking, and also decreased Cu-O-Cu overlap, owing to Pr3+ presence; these phenomena are known to exist in the Pr123 compound, PrBa2Cu3O7−δ (δ∼0), due to ∼10% of Pr3+ ions having tendency to occupy Ba2+ sites. Measurements done on undoped and Cu-doped SrHo2116 show similar SG and SGSC properties. Further, the undoped and Cu-doped SrY2116 crystals grown by hydrothermal growth technique (i.e., grown using lower temperature and high pressure) show same behaviors. From these investigations it can be said that the undoped Ru-double perovskites (A2BB′O6, B′=Ru) are SG systems and that Cu-doped Ru-double perovskites (A2BB′Oδ, δ∼6, B′=Ru1−x Cux, 0<x≲0.3) are SG superconductors (SGSCs). Results are discussed. Springer Science+Business Media, LLC, 2010 Double perovskite nationallicence Ruthenocuprate nationallicence High- T c superconductivity nationallicence Magnetic superconductor nationallicence Frustration nationallicence Spin glass nationallicence Rao S. Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan (ROC) aut Srivastava J. Tata Institute of Fundamental Research, 400005, Mumbai, India aut Wu M. Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan (ROC) aut Mok B. Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan (ROC) aut Chen C. Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan (ROC) aut Ling M. Department of Physics, National Taiwan Normal University, 116, Taipei, Taiwan (ROC) aut Liu H.-L Department of Physics, National Taiwan Normal University, 116, Taipei, Taiwan (ROC) aut Chen Y. Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan (ROC) aut Ho J. Department of Physics, Wichita State University, 67260-0032, Wichita, KS, USA aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/4(2011-05-01), 1249-1262 1557-1939 24:4<1249 2011 24 10948 https://doi.org/10.1007/s10948-010-0819-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-0819-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rao S. Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan (ROC) aut NATIONALLICENCE 700 1- Srivastava J. Tata Institute of Fundamental Research, 400005, Mumbai, India aut NATIONALLICENCE 700 1- Wu M. Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan (ROC) aut NATIONALLICENCE 700 1- Mok B. Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan (ROC) aut NATIONALLICENCE 700 1- Chen C. Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan (ROC) aut NATIONALLICENCE 700 1- Ling M. Department of Physics, National Taiwan Normal University, 116, Taipei, Taiwan (ROC) aut NATIONALLICENCE 700 1- Liu H.-L Department of Physics, National Taiwan Normal University, 116, Taipei, Taiwan (ROC) aut NATIONALLICENCE 700 1- Chen Y. Institute of Physics, Academia Sinica, Nankang, Taipei 115, Taiwan (ROC) aut NATIONALLICENCE 700 1- Ho J. Department of Physics, Wichita State University, 67260-0032, Wichita, KS, USA aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/4(2011-05-01), 1249-1262 1557-1939 24:4<1249 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer