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Phase relations and superconducting properties of the Y–Ni–B–C system

Published online by Cambridge University Press:  26 July 2012

G. Behr ,
W. Löser ,
G. Graw ,
K. Nenkov ,
U. Krämer ,
A. Belger  and
B. Wehner
G. Behr
Affiliation:
Institut für Festkörper- und Werkstofforschung Dresden, PF 27 00 16, D-01171 Dresden, Germany
W. Löser
Affiliation:
Institut für Festkörper- und Werkstofforschung Dresden, PF 27 00 16, D-01171 Dresden, Germany
G. Graw
Affiliation:
Institut für Festkörper- und Werkstofforschung Dresden, PF 27 00 16, D-01171 Dresden, Germany
K. Nenkov
Affiliation:
Institut für Festkörper- und Werkstofforschung Dresden, PF 27 00 16, D-01171 Dresden, Germany
U. Krämer
Affiliation:
Institut für Kristallographie und Festkörperphysik der TU Dresden, Germany
A. Belger
Affiliation:
Institut für Kristallographie und Festkörperphysik der TU Dresden, Germany
B. Wehner
Affiliation:
Institut für Kristallographie und Festkörperphysik der TU Dresden, Germany
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Extract

The influence of composition and high-temperature heat treatment on phase content and superconducting properties of the Yni2B2C phase was investigated. Phase relations in those parts of the Y–Ni–B–C quaternary phase diagram, which are relevant for the YNi2B2C intermetallic phase formation, were revealed by x-ray diffraction, optical and scanning electron microscopy, and high-temperature differential thermoanalysis. A widespread interval of superconducting transition temperatures TC = 10.4–15.2 K and small transition width <0.3 K were determined from samples of different nominal compositions after high-temperature annealing. The different intrinsic properties are ascribed to composition variations of the YNi2B2C phase and related to structure parameters, residual resistance ratios, and element concentrations determined by the electron probe microanalysis.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 1 , January 1999 , pp. 16 - 23
Copyright
Copyright © Materials Research Society 1999

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References

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