Dresden 2017 – scientific programme
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TT: Fachverband Tiefe Temperaturen
TT 53: Poster Session: Superconductivity 1
TT 53.17: Poster
Wednesday, March 22, 2017, 15:00–19:00, P2-OG2
Magnetic and electric characterization of bulk FeSe superconductors with Ag addition — Thomas Karwoth1, •XianLin Zeng1, Koichi Furutani1,2, Alex Wiederhold1, Michael Koblischka1, M Muralidhar2, M Murakami2, and Uwe Hartmann1 — 1Institute of Experimental Physics, Saarland University, Campus C 6 3, 66123 Saarbrücken, Germany. — 2Superconducting Materials Laboratory, Department of Materials Science and Engineering, Shibaura Institute of Technology, 3-7-5 Toyosu, Koto-ku, Tokyo 135-8548, Japan
Superconductivity of bulk FeSe samples was characterized through magnetic and electric measurements. In order to improve the superconducting properties, the sintering temperature was varied up to 900 oC and to improve the connectivity, silver was applied in low concentrations to the samples ranging from 0 to 7%. The electric properties of the samples were investigated by the four point probe method (R-T measurement and V-I characteristics). Generally, the sample with 4The magnetic properties (M-T and M-H) of the samples were measured using an extraction magnetometer in a Quantum Design PPMS with fields up to 7 T. The critical current densities and the flux pinning forces were estimated using the extended Bean model, extending the work published in [1].
[1] M. Muralidhar et al., Phys. stat. solidi (a), DOI 10.1002/pssa.201600299.