Berlin 2012 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
TT: Fachverband Tiefe Temperaturen
TT 33: Superconductivity, Measuring Devices, Matter at Low Temperature: Poster Session
TT 33.26: Poster
Wednesday, March 28, 2012, 15:00–19:00, Poster B
High-field and low-temperature study of the nanostructured ferromagnetic superconductor Bi3Ni — •Thomas Herrmannsdörfer1, Richard Skrotzki1, 2, Rico Schönemann1, Iurii Scurschii1, Jochen Wosnitza1, Daniel Köhler2, Regine Boldt3, and Michael Ruck2 — 1Dresden High Magnetic Field Laboratory, Helmholtz-Zentrum Dresden-Rossendorf, Dresden — 2Department of Chemistry and Food Chemistry, TU Dresden, Dresden — 3Leibniz Institute of Polymer Research, Dresden
We have demonstrated the coexistence of superconductivity and ferromagnetism in Bi3Ni nanostructures which have been prepared by making use of novel chemical-reaction paths [1]. Here, we present recent experiments on novel nanostructures, such as monodisperse spherical clusters with a diameter of 8 nm as well as nanofibers. We have investigated their magnetic and electrical-transport properties by means of SQUID magnetometry, pulsed-field susceptometry, and ac-resistance measurements in a wide field and temperature range. Pulsed-field susceptibility data up to 60 T allow for a determination of the saturation
magnetization of Bi3Ni nanostructures. Resistivity measurements performed on moderately compacted Bi3Ni nano fibers down to sub-Kelvin temperatures have shown clear evidence for the existence of an isosbestic point. These results will be presented in the context of a coexistence of superconductivity and ferromagnetism. Part of this work was supported by EuroMagNET, EU-contract No. 228043.
T. Herrmannsdörfer, R. Skrotzki, J. Wosnitza, D. Köhler, R. Boldt, M. Ruck, Phys. Rev. B 83, 140501 (R) (2011).