{"paper":{"title":"Upper Critical Field of Pressure-Induced Superconductor EuFe$_2$As$_2$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"Atsushi Harada, Hiroyuki S. Suzuki, Keizo Murata, Kota Kodama, Megumi Tomita, Motoi Kimata, Nobuyuki Kurita, Shinya Uji, Taichi Terashima, Takehiko Matsumoto","submitted_at":"2010-11-23T13:17:00Z","abstract_excerpt":"We have carried out high-field resistivity measurements up to 27\\,T in EuFe$_2$As$_2$ at $P$\\,=\\,2.5\\,GPa, a virtually optimal pressure for the $P$-induced superconductivity, where $T_\\mathrm{c}$\\,=\\,30\\,K. The $B_\\mathrm{c2}-T_\\mathrm{c}$ phase diagram has been constructed in a wide temperature range with a minimum temperature of 1.6 K ($\\approx 0.05 \\times T_\\mathrm{c}$), for both $B \\parallel ab$ ($B_\\mathrm{c2}^\\mathrm{ab}$) and $B \\parallel c$ ($B_\\mathrm{c2}^\\mathrm{c}$). The upper critical fields $B_\\mathrm{c2}^\\mathrm{ab}$(0) and $B_\\mathrm{c2}^\\mathrm{c}$(0), determined by the onset o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1011.5084","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"}