Tracer diffusion of oxygen inBi2Sr2

M. Runde

¹

,

J.L. Routbort

²

,

S. J. Rothman

³

et al.

Maskless X-Ray Writing of Electrical Devices on a Superconducting Oxide with Nanometer Resolution and Online Process Monitoring

“…In the case of Bi-2212, no value for T d has been explicitly reported so far, to the best of our knowledge. However, both the value of the activation energy for the oxygen diffusion coefficient in the ab -plane (0.93 eV) 31 and the value reported for the binding energy of interstitial oxygen atoms (0.073 eV) 32 compare favourably to the value used for Y-123, thus suggesting some role of the knock-on mechanism in this effect.…”

Oxide Superconductors

“…The rate of diffusion in the a b plane is approximately the same as for polycrystalline samples, whereas the rate of diffusion in the c-direction is orders of magnitude slower. The data also indicate that in YBa 2 Cu 3 O 7 _ 5 the rate of diffusion along the Cu-O chains dominates the diffusion in the a b plane, being much higher than in the a-direction (after Rothman et al, 1991, andRunde et al, 1992).…”

Enhancement of Bi-2223 phase formation by electrical assisted laser floating zone technique

“…From the high coincidence of lattice sites, the nuclei-solid interface will have low surface energy. In this model, Bi diffuses from 2212 to 14/24 and Ca-Cu ions diffuse in the opposite direction, along the a-b interplanar spacing of 2223, where the cations diffusivity is 1-3 order higher than in c direction [10]. The 2223 crystals advancing by interdiffusion is also accompanied by thickening, Fig.…”