Electronic structure of YNi1-xCuxBC studied by X-ray emission and photoelectron spectroscopy
Autor(en): | Kurmaev, EZ Ezhov, AV Cherkashenko, VM Shamin, SN Bartkowski, S Neumann, M Gangopadhyay, AK |
Stichwörter: | BORIDE CARBIDE; INTERMETALLIC COMPOUNDS; NI; PHOTOEMISSION; Physics; Physics, Condensed Matter; SUPERCONDUCTING LUNI2B2C; YNI2B2C | Erscheinungsdatum: | 1998 | Herausgeber: | PERGAMON-ELSEVIER SCIENCE LTD | Journal: | SOLID STATE COMMUNICATIONS | Volumen: | 105 | Ausgabe: | 1 | Startseite: | 65 | Seitenende: | 70 | Zusammenfassung: | Results of first measurements of X-ray emission spectra (Ni L alpha, Cu L alpha and B K alpha) and X-ray photoelectron spectra (valence band and core levels) of YNi1-xCuxBC (x = 0.1-0.55) are presented. It is found that Ni and Cu 3d-states have predominantly metallic character and provide the main contribution to the density of states at the Fermi level N(E-f) N(E-f) progressively increases with x and correlates well with the magnetic susceptibility measurements, accounting for the increase in T-c with copper doping. In Ni 2p(3/2) XPS a low intensity high-energy satellite peak is found which can be attributed to two-hole bound states. Selective oxidation of Y-atoms is found under exposure of the freshly cleaved surface of YNi0.6Cu0.4BC to air. (C) 1997 Elsevier Science Ltd. |
ISSN: | 00381098 | DOI: | 10.1016/S0038-1098(97)00306-2 |
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geprüft am 28.05.2024