AN EXPERIMENTAL-STUDY OF COPPER SELF-DIFFUSION IN CUO, Y2CU2O5 AND YBA2CU3O7-X BY SECONDARY NEUTRAL MASS-SPECTROMETRY

Authors
REBANE JA YAKOVLEV NV CHICHERIN DS TRETYAKOV YD LEONYUK LI YAKUNIN VG
Citation
Ja. Rebane et al., AN EXPERIMENTAL-STUDY OF COPPER SELF-DIFFUSION IN CUO, Y2CU2O5 AND YBA2CU3O7-X BY SECONDARY NEUTRAL MASS-SPECTROMETRY, Journal of materials chemistry, 7(10), 1997, pp. 2085-2089
Citations number
13
Categorie Soggetti
Chemistry Physical","Material Science
Journal title
Journal of materials chemistry → ACNP
ISSN journal
09599428
Volume
7
Issue
10
Year of publication
1997
Pages
2085 - 2089
Database
ISI
SICI code
0959-9428(1997)7:10<2085:AEOCSI>2.0.ZU;2-Z
Abstract
Copper self-diffusion has been studied in CuO, Y2Cu2O5 and YBa2Cu3O7-x ceramics by the SNMS (secondary neutral mass spectrometry) technique in the temperature range 700-900 degrees C with the stable isotope Cu- 63 used as a tracer. The lowest diffusion rate and the highest value o f activation energy were found for the Y2Cu2O5 phase. Copper self-diff usion was also studied along the c axis of YBa2Cu3O7-x single crystals . It was shown that the anisotropy of Cu diffusion in YBa2Cu3O7-x is r ather high. The diffusion rate in the c direction of single crystals i s more than two orders of magnitude lower than that in ceramic samples .