A thin film of superconducting YBa2Cu3O~7 (YBCO) system (Tc ~ 89 K) has been studied by x-ray photoelectron spectroscopy (XPS) to investigate the core level electronic structure. The Ba 3d and 4d core level XPS spectra show three binding energy components with the high binding energy component originating from the non-superconducting surface of the system. The role of oxygen ordering/disordering has been discussed to explain the origin of the other two bulk-dependent components. An attempt has been made to resolve some of the discrepancies in the Ba core level spectra reported earlier.
Study of Ba Core Level Binding Energies in a YBa2Cu3O~7 Thin Film / P., Srivastava; Saini, Naurang Lal; B. R., Sekhar; S. K., Sharma; H. S., Chauhan; K. B., Garg; B., Mercey; Lecoeur, P. H.; H., Murray. - In: MODERN PHYSICS LETTERS B. - ISSN 0217-9849. - STAMPA. - 7:(1993), p. 555. [10.1142/S0217984993000540]
Study of Ba Core Level Binding Energies in a YBa2Cu3O~7 Thin Film.
SAINI, Naurang Lal;
1993
Abstract
A thin film of superconducting YBa2Cu3O~7 (YBCO) system (Tc ~ 89 K) has been studied by x-ray photoelectron spectroscopy (XPS) to investigate the core level electronic structure. The Ba 3d and 4d core level XPS spectra show three binding energy components with the high binding energy component originating from the non-superconducting surface of the system. The role of oxygen ordering/disordering has been discussed to explain the origin of the other two bulk-dependent components. An attempt has been made to resolve some of the discrepancies in the Ba core level spectra reported earlier.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
