Four layer monolithic integrated high Tc dc SQUID magnetometer

J.W.M. Hilgenkamp, G.C.S. Brons, J.G. Soldevilla, R.P.J. IJsselsteijn, J. Flokstra, H. Rogalla

Research output: Contribution to journalArticleAcademicpeer-review

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YBa2Cu3O7−x based monolithic integrated dc SQUID magnetometers, consisting of a dc SQUID integrated with a flux transformer on a single bicrystalline substrate, have been fabricated and characterized. The devices consist of four layers, including two superconducting layers, and first realizations operate up to 73 K. A maximum voltage modulation of 32 μV is observed at 40 K. A field sensitivity of 0.17 pT/√Hz is obtained above 200 Hz at 45 K and 0.49 pT/√Hz at 1 Hz and 65 K.
Original languageEnglish
Pages (from-to)3497-3499
Number of pages3
JournalApplied physics letters
Issue number25
Publication statusPublished - 1994


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