Tetragonal to orthorhombic phase transition in SmFeAsO: a synchrotron powder diffraction investigation

A. Martinelli; A. Palenzona; C. Ferdeghini; M. Putti; E. Emerich

doi:10.1016/j.jallcom.2008.10.153

Tetragonal to orthorhombic phase transition in SmFeAsO: a synchrotron powder diffraction investigation

Superconductivity 2022-11-30 v1

Authors: A. Martinelli , A. Palenzona , C. Ferdeghini , M. Putti , E. Emerich

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Abstract

The crystal structure of SmFeAsO has been investigated by means of Rietveld refinement of high resolution synchrotron powder diffraction data collected at 300 K and 100 K. The compound crystallizes in the tetragonal P4/nmm space group at 300 K and in the orthorhombic Cmma space group at 100 K; attempts to refine the low temperature data in the monoclinic P112/n space group diverged. On the basis of both resistive and magnetic analyses the tetragonal to orthorhombic phase transition can be located at T about 140 K.

Keywords

SmFeAsO crystal structure tetragonal to orthorhombic phase transition synchrotron powder diffraction Rietveld refinement iron-based superconductor

Cite

@article{arxiv.0808.1024,
  title  = {Tetragonal to orthorhombic phase transition in SmFeAsO: a synchrotron powder diffraction investigation},
  author = {A. Martinelli and A. Palenzona and C. Ferdeghini and M. Putti and E. Emerich},
  journal= {arXiv preprint arXiv:0808.1024},
  year   = {2022}
}

Comments

Submitted to: Superconductor Science and Technology PACS: 61.05.cp, 61.66.Fn, 74.10.+v, 74.62.Dh, 74.70.Dd

Tetragonal to orthorhombic phase transition in SmFeAsO: a synchrotron powder diffraction investigation

Abstract

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