Grain boundary weak link in a-b plane in MgB2 film
Journal article, 2006

The authors have fabricated the Mg B2 bridges 850-6000 nm in width on bicrystal (111) MgO substrates with in-plane grain boundaries of the two types: 13°13° 〈110〉 and 13°13° 〈112〉. Annealing in oxygen of the films on 〈110〉 bicrystal substrates leads to a systematic decrease of critical current, a widening of the transition temperature width, and an improvement of the shape of IV curve that finally looks more like a Josephson junction. They have measured a response of such samples to the microwave radiation at 110 GHz with the voltage amplitude up to 0.5 mV.


EA Stepantsov

Russian Academy of Sciences

Mikhail Tarasov

National Research University of Electronic Technology (MIET)

M. Naito

Tokyo University of Agriculture and Technology

A. Tsukada

Tokyo University of Agriculture and Technology

Dag Winkler

Chalmers, Microtechnology and Nanoscience (MC2)

Applied Physics Letters

0003-6951 (ISSN) 1077-3118 (eISSN)

Vol. 89 21 213111

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering



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