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MgB2 radio-frequency superconducting quantum interference device prepared by atomic force microscope lithography

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9 Author(s)
Gregor, M. ; Department of Experimental Physics, Comenius University, SK-84248 Bratislava, Slovakia ; Plecenik, T. ; Prascak, M. ; Micunek, R.
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A new method of preparation of radio-frequency superconducting quantum interference devices on MgB2 thin films is presented. The variable-thickness bridge was prepared by a combination of optical lithography and of the scratching by an atomic force microscope. The critical current of the nanobridge was 0.35 μA at 4.2 K. Noncontact measurements of the current-phase characteristics and of the critical current versus temperature have been investigated on the authors’ structures.

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Applied Physics Letters  (Volume:91 ,  Issue: 12 )