Evidence of structural phase transition in superconducting SmFeAsO_(1-x)F_x from 19^F NMR

2012/11/19 by M. Majumder, Majumder, M., K. Ghoshray +11
Materials Science · #FOS: Physical sciences #Iron-based superconductors research #Strongly Correlated Electrons (cond-mat.str-el) #Superconductivity (cond-mat.supr-con)

paper · pdf · doi:10.48550/arxiv.1211.4325

openalex publication_date 2012/11/19 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28

Abstract

We report the resistivity, magnetization and 19^F NMR results in polycrystalline sample of SmFeAsO_(0.86)F_(0.14). The resistivity and the magnetization data show a sharp drop at 48 K indicating the superconducting transition. The nuclear spin-lattice rate (1/T₁) and spin-spin relaxation rate (1/T₂) clearly show the existence of a structural phase transition near 163 K in the sample which also undergo superconducting transition. This finding creates interest to explore whether this is unique for only Sm based systems or it is also present in other rare-earth based 1111 superconductors.

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