caa a22 4500 445383062 CHVBK 20180317143023.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10948-010-1071-7 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1071-7 Magnetic and Thermal Behavior of Ru0.9Sr2YCu2.1O7.9 Magneto-Superconductor Synthesized by High-Pressure High-Temperature Technique [Elektronische Daten] [Anuj Kumar, Bhaskar Gahtori, Ashok Rao, Y. Kuo, Shahnawaz,, V. Awana, R. Tandon] The structural, physical, and thermal property details of Ru0.9Sr2YCu2.1O7.9 (Y/Ru-1212) superconducting material synthesized through high pressure (6GPa) and a high temperature (1400 °C) (HPHT) route are reported here. (Y/Ru-1212) crystallizes in P4/mmm tetragonal structure and is found free of any detectable impurities through X-ray diffractometry. Ru-spins are ordered magnetically above 145K, with a sizeable ferromagnetic component at 5K. Further clear diamagnetic transitions are seen in both zero-field-cooled (ZFC) and field-cooled (FC) magnetic susceptibility measurements and exhibiting superconductivity below 50K. Both the thermoelectric power (S) and thermal conductivity (κ) measurements show superconductivity onset below 50K with S=0 at 30K and a broad hump in heat capacity C p (T) below 30K. Heat capacity (C p ) measurements also exhibit the magnetic ordering temperature as a hump below 145K. The appearance of a hump in C p (T), instead of a clear transition, is indicative of short range magnetic correlations like spin glass (SG). Neither the high (145K) nor the low (30K) temperature humps of C p (T) could be analyzed quantitatively because of short magnetic correlations in former and mixing of both superconductivity and FM components in a later case. The observed data is compared with various reported Ru-1212 systems synthesized under normal pressure conditions. It is concluded that HPHT synthesized Y/Ru-1212 is a bulk superconductor below 30K with a substantial FM component. Springer Science+Business Media, LLC, 2010 Superconductors nationallicence Magnetic materials nationallicence X-ray diffraction nationallicence Thermal conductivity nationallicence Specific heat nationallicence Kumar Anuj Quantum Phenomena Applications Division, National Physical Laboratory (CSIR), Dr. K.S. Krishnan Marg, 110012, New Delhi, India aut Gahtori Bhaskar Quantum Phenomena Applications Division, National Physical Laboratory (CSIR), Dr. K.S. Krishnan Marg, 110012, New Delhi, India aut Rao Ashok Department of Physics, Manipal Institute of Technology, 576104, Manipal, India aut Kuo Y. Department of Physics, National Dong-Hwa University, 974, Hualien, Taiwan aut Shahnawaz, Department of Physics and Astrophysics, University of Delhi, 110007, Delhi, India aut Awana V. Quantum Phenomena Applications Division, National Physical Laboratory (CSIR), Dr. K.S. Krishnan Marg, 110012, New Delhi, India aut Tandon R. Department of Physics and Astrophysics, University of Delhi, 110007, Delhi, India aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/5(2011-07-01), 1643-1648 1557-1939 24:5<1643 2011 24 10948 https://doi.org/10.1007/s10948-010-1071-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1071-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kumar Anuj Quantum Phenomena Applications Division, National Physical Laboratory (CSIR), Dr. K.S. Krishnan Marg, 110012, New Delhi, India aut NATIONALLICENCE 700 1- Gahtori Bhaskar Quantum Phenomena Applications Division, National Physical Laboratory (CSIR), Dr. K.S. Krishnan Marg, 110012, New Delhi, India aut NATIONALLICENCE 700 1- Rao Ashok Department of Physics, Manipal Institute of Technology, 576104, Manipal, India aut NATIONALLICENCE 700 1- Kuo Y. Department of Physics, National Dong-Hwa University, 974, Hualien, Taiwan aut NATIONALLICENCE 700 1- Shahnawaz Department of Physics and Astrophysics, University of Delhi, 110007, Delhi, India aut NATIONALLICENCE 700 1- Awana V. Quantum Phenomena Applications Division, National Physical Laboratory (CSIR), Dr. K.S. Krishnan Marg, 110012, New Delhi, India aut NATIONALLICENCE 700 1- Tandon R. Department of Physics and Astrophysics, University of Delhi, 110007, Delhi, India aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/5(2011-07-01), 1643-1648 1557-1939 24:5<1643 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer