X-ray photoemission measurements were performed on YBa2Cu3O7-x thin films in order to understand the origin and nature of various features appearing in O 1s spectra before and after sputtering. The peak appearing at 528.8 eV is totally intrinsic and is assigned to the bulk. Peak appearing at about 531.2 eV which has been a subject of controversy, extrinsic or intrinsic in origin, is shown to entirely originate from the unstable surface layer of YBa2Cu3O7-x which is non-superconducting at room temperature under UHV environment. The peak at 530.4 arises because of the change in the environment of oxygen atoms present in this non-superconducting layer on sputtering.
Study of O 1s Binding Energy in YBa2C3O7-x / P., Srivastava; B. R., Shekhar; Saini, Naurang Lal; S. K., Sharma; K. B., Garg; B., Mercey; P. H. LECOEUR, H. MURRAY. - In: SOLID STATE COMMUNICATIONS. - ISSN 0038-1098. - STAMPA. - 88:(1993), pp. 105-110. [10.1016/0038-1098(93)90388-4]
Study of O 1s Binding Energy in YBa2C3O7-x
SAINI, Naurang Lal;
1993
Abstract
X-ray photoemission measurements were performed on YBa2Cu3O7-x thin films in order to understand the origin and nature of various features appearing in O 1s spectra before and after sputtering. The peak appearing at 528.8 eV is totally intrinsic and is assigned to the bulk. Peak appearing at about 531.2 eV which has been a subject of controversy, extrinsic or intrinsic in origin, is shown to entirely originate from the unstable surface layer of YBa2Cu3O7-x which is non-superconducting at room temperature under UHV environment. The peak at 530.4 arises because of the change in the environment of oxygen atoms present in this non-superconducting layer on sputtering.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
