{"paper":{"title":"Strongly nonlinear magnetization above $T_c$ in $\\rm Bi_2Sr_2CaCu_2O_{8+\\delta}$","license":"","headline":"","cross_cats":["cond-mat.str-el"],"primary_cat":"cond-mat.supr-con","authors_text":"Lu Li, M. J. Naughton, N. P. Ong, S. Ono, Yayu Wang, Yoichi Ando","submitted_at":"2005-07-26T17:54:54Z","abstract_excerpt":"Using high-resolution magnetometry we have investigated in detail the magnetization $M$ above the critical temperature $T_c$ in $\\rm Bi_2Sr_2CaCu_2O_{8+\\delta}$. In a broad range of temperature $T$ above $T_c$, we find that $M(T,H)$ is strongly non-linear in the field $H$. We show that as $T\\to T_c$, the susceptibility $\\chi(T,H)$ diverges to very large values ($\\chi \\to$ -1) if measured in weak $H$. In addition, $M(H)$ displays an anomalous non-analytic form $M\\sim H^{1/\\delta}$ in weak fields with a strongly $T$-dependent exponent $\\delta(T)$. These features strongly support the proposal tha"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0507617","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"}