Evidence for secondary-phase superconductivity in YNi4BC0.2

Abstract

Disclaimer/Complaints regulationsIf you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: http://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. We have performed a metallurgical analysis of YNi4BCo.2 by X-ray diffraction and electron-probe microanalysis on as-cast and annealed samples. The superconducting properties of these samples were investigated by resistivity and p.SR measurements. Our experiments indicate that YNi4BCo.2 is not superconducting as reported earlier, but that a second phase of the recently found quarternary compound YNi2B2C causes the zero resistance of YNi4BCo.z