Properties of artificial grain boundary weak links grown on Y-ZrO2 bicrystals

Z G Ivanov; P A Nilsson; D Winkler; J A Alarco; G Brorsson; T Claeson; E A Stepantsov; A Ya Tzalenchuk

doi:10.1088/0953-2048/4/9/016

Superconductor Science and Technology

Properties of artificial grain boundary weak links grown on Y-ZrO₂ bicrystals

Z G Ivanov¹, P A Nilsson¹, D Winkler¹, J A Alarco¹, G Brorsson¹, T Claeson¹, E A Stepantsov¹ and A Ya Tzalenchuk¹

Published under licence by IOP Publishing Ltd
Superconductor Science and Technology, Volume 4, Number 9 Citation Z G Ivanov et al 1991 Supercond. Sci. Technol. 4 439 DOI 10.1088/0953-2048/4/9/016

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¹ Dept. of Phys., Chalmers Univ. of Technol., Goteborg, Sweden

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Abstract

Weak links were fabricated by pulsed laser deposition of YBa₂Cu₃O_x thin films on Y-ZrO₂ bicrystal substrates. They were formed by transferring the bicrystal boundary into the epitaxial film during the film growth. Their properties were determined by the misorientation angle ( theta ) between the two halves of the bicrystal. The transport properties of the weak links were studied as a function of theta and an exponential dependence of the weak link critical current density was observed for angles up to 45 degrees . Clear Josephson effects with good microwave and magnetic field response were observed.

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