{"paper":{"title":"High-field electron spin resonance spectroscopy study of GdO$_{1-x}$F$_{x}$FeAs superconductors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"(2) Universit\\\"at Z\\\"urich - Physik-Institut, (3) Kirchhoff Institute for Physics, (4) Laboratory for Solid State Physics, A. Alfonsov (1), A. K\\\"ohler (1), A. Kondrat (1), B. B\\\"uchner (1) ((1) IFW Dresden, C. Hess (1), Dresden, ETH Zurich, F. Mur\\'anyi (2), G. Behr (1), Germany, G. Lang (1), Heidelberg, Heidelberg University, J. Karpinski (4), L. Wang (1), M. Deutschmann (1), N. D. Zhigadlo (4), N. Leps (1), R. Klingeler (3), S. Hampel (1), S. Katrych (4), Switzerland, Switzerland), S. Wurmehl (1), V. Kataev (1), Z. Bukowski (4), Zurich","submitted_at":"2010-10-25T09:54:06Z","abstract_excerpt":"We report a detailed investigation of GdO$_{1-x}$F$_{x}$FeAs (x = 0, 0.07 and 0.14) samples by means of high-field/high-frequency electron spin resonance (HF-ESR) together with measurements of thermodynamic and transport properties. The parent GdOFeAs compound exhibits Fe long-range magnetic order below 128 K, whereas both doped samples do not show such order and are superconducting with T$_c$ = 20 K (x = 0.07) and T$_c$ = 45 K (x = 0.14). The Gd$^{3+}$ HF-ESR reveals an appreciable exchange coupling between Gd and Fe moments, through which the static magnetic order is clearly seen in the pare"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1010.5070","kind":"arxiv","version":3},"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"}