Superconducting quantum interference device based on MgB2 nanobridges


Brinkman, Alexander and Veldhuis, Dick and Mijatovic, Dragana and Rijnders, Guus and Blank, Dave H.A. and Hilgenkamp, Hans and Rogalla, Horst (2001) Superconducting quantum interference device based on MgB2 nanobridges. Applied Physics Letters, 79 (15). pp. 2420-2422. ISSN 0003-6951

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Abstract:The superconductor MgB2, with a transition temperature of 39 K, has significant potential for future electronics. An essential step is the achievement of Josephson circuits, of which the superconducting quantum interference device ~SQUID! is the most important. Here, we report Josephson quantum interference in superconducting MgB2 thin films. Modulation voltages of up to 30 mV are observed in an all-MgB2 SQUID, based on focused-ion-beam patterned nanobridges. These bridges, with a length scale ,100 nm, have outstanding critical current densities of 73106 A/cm2 at 4.2 K.
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Copyright:© 2001 American Institute of Physics
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Metis ID: 200475