A comparative investigation of oxygen in-diffusion in the orthorhombic phase of REBCO (RE:: Y, Sm, Nd) by in situ electrical resistance

Authors
Zhang, H Zou, XW Wang, ZH Chen, YX
Citation
H. Zhang et al., A comparative investigation of oxygen in-diffusion in the orthorhombic phase of REBCO (RE:: Y, Sm, Nd) by in situ electrical resistance, PHYSICA C, 337(1-4), 2000, pp. 307-311
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA C
ISSN journal
09214534 → ACNP
Volume
337
Issue
1-4
Year of publication
2000
Pages
307 - 311
Database
ISI
SICI code
0921-4534(200007)337:1-4<307:ACIOOI>2.0.ZU;2-I
Abstract
The relaxation behavior of the isothermal electrical resistance has been co mparatively investigated in the single orthorhombic phase of REBCO (RE: Y, Sm, Nd) powder sinters in oxygen uptaking processes. It can be well describ ed by an oxygen uptaking process controlled by the lattice diffusion. The r elaxation activation energy, i.e., the diffusion activation energy is 1.2, 1.0 and 0.7 eV for YBa2Cu3Oy, SmBa2Cu3Oy and Nd1.1Ba1.9Cu3Oy, respectively. It indicates that the diffusion activation energy of oxygen in REBCO decre ases with the increase of RE ion size. It may be connected with the repulsi ve energy between O(1) and O(5). (C) 2000 Elsevier Science B.V. All rights reserved.