Effect of Stress Fields of Small-Angle Tilt Grain Boundaries
on Structural Inhomogeneities
in High-Temperature Superconductors

A. Yu. Kraevski and I. A. Ovid’ko

Institute of Problems in Machine Science, Russian Academy of Sciences,
Vasil’evski ostrov, Bol’sho pr. 61, St. Petersburg, 199178 Russia

e-mail: ovidko@def.ipme.ru

Received November 16, 1999; in final form, January 19, 2000

Abstract—The effect of dilatational stresses of grain boundaries on the atomic structure rearrangement near
these boundaries in high-temperature superconductors is discussed. The concentration profiles characterizing
the spatially inhomogeneous distribution of oxygen near small-angle tilt boundaries in Bi–Sr–Ca–Cu–O super-
conductors are calculated. © 2000 MAIK “Nauka/Interperiodica”.

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