{"paper":{"title":"Infrared absorption study of charge ordered $La{}_{0.5}Ca{}_{0.5-x}Sr_{x}MnO_{3}$ $(0.1\\leq x\\leq0.5$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.mtrl-sci","authors_text":"A. Das, Indu Dhiman, K. R. Priolkar, P. S. R. Murthy","submitted_at":"2011-01-07T05:53:57Z","abstract_excerpt":"Infrared absorption study has been carried out on a series of half doped manganites, $La_{0.5}Ca_{0.5-x}Sr_{x}MnO_{3}$ $(0.1\\leq x\\leq0.5)$, with varying magnetic ground state. The charge ordering transition observed in samples with {\\normalsize $x\\leq0.3$ is accompanied by a mode at $\\sim525cm^{-1}$ in addition to the stretching mode at $615cm^{-1}$ and bending mode at $400cm^{-1}$. Phonon hardening is found to occur below the CE - type antiferromagnetic ordering temperature. The value of the insulating gap decreases on doping with Sr from $727cm^{-1}$ to $615cm^{-1}.$}"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1101.1356","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"}