Dresden 2017 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 53: Poster Session: Superconductivity 1

TT 53.17: Poster

Mittwoch, 22. März 2017, 15:00–19:00, P2-OG2

Magnetic and electric characterization of bulk FeSe superconductors with Ag additionThomas Karwoth1, •XianLin Zeng1, Koichi Furutani1,2, Alex Wiederhold1, Michael Koblischka1, M Muralidhar2, M Murakami2, and Uwe Hartmann11Institute 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.

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