caa a22 4500 44538168X CHVBK 20180317143019.0 cr unu---uuuuu 170323e20110101xx s 000 0 eng 10.1007/s10948-010-1021-4 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1021-4 Comparison of Different Critical Current Density Models forUndoped Monofilamentary Ti-Sheathed MgB2 Tapes [Elektronische Daten] [J. Viljamaa, L. Rostila, P. Kováč, T. Melíšek, A. Hinterberger, M. Reissner] Two J c dependency on B models with physical backgrounds and two semiempirical models are fitted in fields B>1.5T to critical current measurements. The measurements were previously performed on various undoped titanium sheathed monocore MgB2 tapes. The models are fitted to magnetic measurements performed at temperatures ranging from 4.2 to 15 K and to transport measurements in both parallel and perpendicular directions. These parameters of the introduced models have clear physical interpretations, such as, the zero field critical current density, the zero resistivity field, and the steepness factor. The parameters are solved through numerical optimization. The goal is to find a model with simple parameters that produce computed values which match those observed through direct measurements. In the future, these parameters can be used to gather information about pinning, to compare the performance of the conductors, and to develop these further. The results indicate that many kind of models are sufficient to describe the J c(B) behavior of different kinds of tapes and measurement methods in various temperatures. They also enable the reconstruction of the J c(B) dependence even from a limited number of data points or a narrow measurement range. In addition, the F p behaviors of the samples are compared to the characteristic grain boundary pinning in MgB2. Springer Science+Business Media, LLC, 2010 Magnesium diboride nationallicence Material characterization nationallicence Critical current density nationallicence Pinning nationallicence Curve fitting nationallicence Viljamaa J. Department of Superconductor Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84101, Bratislava, Slovakia aut Rostila L. Columbus Superconductors S.p.A., Via delle Terre Rosse 30, 16133, Genoa, Italy aut Kováč P. Department of Superconductor Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84101, Bratislava, Slovakia aut Melíšek T. Department of Superconductor Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84101, Bratislava, Slovakia aut Hinterberger A. Institute of Applied and Technical Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, 1040, Vienna, Austria aut Reissner M. Institute of Applied and Technical Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, 1040, Vienna, Austria aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 287-297 1557-1939 24:1-2<287 2011 24 10948 https://doi.org/10.1007/s10948-010-1021-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1021-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Viljamaa J. Department of Superconductor Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84101, Bratislava, Slovakia aut NATIONALLICENCE 700 1- Rostila L. Columbus Superconductors S.p.A., Via delle Terre Rosse 30, 16133, Genoa, Italy aut NATIONALLICENCE 700 1- Kováč P. Department of Superconductor Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84101, Bratislava, Slovakia aut NATIONALLICENCE 700 1- Melíšek T. Department of Superconductor Physics, Slovak Academy of Sciences, Dúbravská cesta 9, 84101, Bratislava, Slovakia aut NATIONALLICENCE 700 1- Hinterberger A. Institute of Applied and Technical Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, 1040, Vienna, Austria aut NATIONALLICENCE 700 1- Reissner M. Institute of Applied and Technical Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, 1040, Vienna, Austria aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/1-2(2011-01-01), 287-297 1557-1939 24:1-2<287 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer