Anelastic Relaxation Of Oxygen Vacancies And High-Tc Superconductivity Of Yba2cu3o7-Delta
SUPERCONDUCTOR SCIENCE & TECHNOLOGY(1990)
Abstract
It is suggested that the variation of the internal friction (IF) characteristics of a single-phase YBCO specimen resulting from an increase of oxygen deficiency δ is associated either with an order diffusion process between layers, or with an order/disorder diffusion process in the Cu(2) plane. The experimental results are explained in the light of these oxygen-vacancy migration processes. The essential connections between high-Tc superconductivity, electric behaviour and oxygen-vacancy ordering are discussed.
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Key words
diffusion process
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