{"paper":{"title":"Spectroscopic study of the magnetic ground state of Nb$_{1-y}$Fe$_{2+y}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.mtrl-sci"],"primary_cat":"cond-mat.str-el","authors_text":"Andreas Neubauer, Christian Pfleiderer, Daniela Rauch, F. Jochen Litterst, F. Malte Grosche, Hubertus Luetkens, J\\\"org Sichelschmidt, Manuel Brando, Mathias Kraken, Stefan S\\\"ullow, Tobias F\\\"orster, William J. Duncan","submitted_at":"2013-12-09T09:39:48Z","abstract_excerpt":"We have investigated single crystals and polycrystals from the series Nb$_{1-y}$Fe$_{2+y}$, $-0.004 \\leq y \\leq 0.018$ by electron spin resonance, muon spin relaxation and M\\\"ossbauer spectroscopy. Our data establish that at lowest temperatures all samples exhibit bulk magnetic order. Slight Fe-excess induces low-moment ferromagnetism, consistent with bulk magnetometry ($\\simeq 0.06 ~\\mu_B/{\\rm Fe}$), Nb--rich and stoichiometric NbFe$_2$ display spin density wave order with small magnetic moment amplitudes of the order $\\sim 0.001 - 0.01 ~\\mu_B/{\\rm Fe}$. This provides microscopic evidence for"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.2357","kind":"arxiv","version":4},"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"}