{"paper":{"title":"Superconducting quantum interference devices with submicron Nb/HfTi/Nb junctions for investigation of small magnetic particles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"A.B. Zorin, D. Koelle, J. Kohlmann, J. Nagel, M. Kemmler, O.F. Kieler, R. Kleiner, R. W\\\"olbing, T. Weimann","submitted_at":"2011-06-10T09:14:59Z","abstract_excerpt":"We investigated, at temperature $4.2\\,\\mathrm{K}$, electric transport, flux noise and resulting spin sensitivity of miniaturized Nb direct current superconducting quantum interference devices (SQUIDs) based on submicron Josephson junctions with HfTi barriers. The SQUIDs are either of the magnetometer-type or gradiometric in layout. In the white noise regime, for the best magnetometer we obtain a flux noise $S_{\\Phi}^{1/2}=250\\,\\mathrm{n}\\Phi_0/\\mathrm{Hz}^{1/2}$, corresponding to a spin sensitivity $S^{1/2}_\\mu\\,\\ge\\,29\\,\\mu_B/\\mathrm{Hz}^{1/2}$. For the gradiometer we find $S_{\\Phi}^{1/2}=300"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1106.1985","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}