Evidence of a structural phase transition in superconducting SmFeAsO(1-x)F(x) from 19F NMR.

Abstract

We report resistivity, magnetization and (19)F NMR results in a polycrystalline sample of SmFeAsO(0.86)F(0.14). The resistivity and magnetization data show a sharp drop at 48 K indicating a superconducting transition. The nuclear spin-lattice rate (1/T(1)) and spin-spin relaxation rate (1/T(2)) clearly show the existence of a structural phase transition near 163 K in the sample, which also undergoes a superconducting transition. This finding creates interest in exploring whether this is unique for Sm based systems or is also present in other rare-earth based 1111 superconductors.

DOI: 10.1088/0953-8984/25/2/025701

Cite this paper

@article{Majumder2013EvidenceOA, title={Evidence of a structural phase transition in superconducting SmFeAsO(1-x)F(x) from 19F NMR.}, author={Manna Majumder and K Ghoshray and Chandan Mazumdar and Asok Poddar and Atanu Ghoshray and David B{\'e}rardan and Nita Dragoe}, journal={Journal of physics. Condensed matter : an Institute of Physics journal}, year={2013}, volume={25 2}, pages={025701} }