Stability and diffusion of Hg implanted YBa2Cu3O6+x

• Type: Article in International Scientific Journal
• Date: 1999

Authors

Araújo, João Pedro (Author) Other; Correia, J. G. (Author) Other; Wahl, Ulrich (Author) Other; Marques, José G. (Author) Other; Alves, Eduardo J. (Author) Other; Amaral, V. S. (Author) Other; Lourenço, A. A C S (Author) Other; Galindo, V. (Author) Other; Von Papen, Tilmann (Author) Other; Sénateur, Jean Pierre (Author) Other; Weiss., François (Author) Other; Vantomme, André (Author) Other; Langouche, Guido (Author) Other; Melo, A. A. (Author) Other; Da Silva, M. F. (Author) Other; Soares, José Carvalho Carvalho (Author) Other; Sousa, João Bessa (Author) FCUP

Journal

Title: Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

Vol. 148

Pages: 807-812

ISSN: 0168-583X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 6 Citations

Scopus - 4 Citations

Other information

Authenticus ID: P-001-624

DOI: 10.1016/s0168-583x(98)00836-2

Abstract (EN): The radioactive isotope Hg-197m was implanted at 60 keV with low fluences (10(13) ions/cm(2)) into YBa2Cu3O6+x (YBCO) superconducting thin films at ISOLDE/CERN. We report on the Hg dynamics and stability inside the YBCO lattice as a function of annealing temperature up to 890 K in a vacuum or O-2 atmosphere. The perturbed angular correlation (PAC) technique was used for probing the Hg behavior at the atomic scale, while by monitoring the sample's activity in situ the Hg outdiffusion was studied. We found that Hg ions occupy unique lattice sites and that Hg should be bound to two apical oxygens. Hg diffusion occurs only for annealing temperatures above 653 K, in vacuum. The Hg migration energy was estimated to be E-M=1.58 +/- 0.15 eV.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6