Magnetic and structural transitions in layered FeAs systems: AFe2As2 versus RFeAsO compounds

C. Krellner; N. Caroca-Canales; A. Jesche; H. Rosner; A. Ormeci; C. Geibel

doi:10.1103/PhysRevB.78.100504

Magnetic and structural transitions in layered FeAs systems: AFe2As2 versus RFeAsO compounds

Superconductivity 2008-09-06 v1 Materials Science

Authors: C. Krellner , N. Caroca-Canales , A. Jesche , H. Rosner , A. Ormeci , C. Geibel

View on arXiv ↗ PDF ↗ DOI ↗

Abstract

Resistivity, specific heat and magnetic susceptibility measurements performed on SrFe2As2 samples evidence a behavior very similar to that observed in LaFeAsO and BaFe2As2 with the difference that the formation of the SDW and the lattice deformation occur in a pronounced first order transition at T_0=205K. Comparing further data evidences that the Fe-magnetism is stronger in SrFe2As2 and in EuFe2As2 than in the other layered FeAs systems investigated up to now. Full potential LDA band structure calculations confirm the large similarity between the compounds, especially for the relevant low energy Fe 3d states. The relation between structural details and magnetic order is analyzed.

Keywords

iron-based superconductor magnetic structure phase transitions

Cite

@article{arxiv.0806.1043,
  title  = {Magnetic and structural transitions in layered FeAs systems: AFe2As2 versus RFeAsO compounds},
  author = {C. Krellner and N. Caroca-Canales and A. Jesche and H. Rosner and A. Ormeci and C. Geibel},
  journal= {arXiv preprint arXiv:0806.1043},
  year   = {2008}
}

Comments

4 pages, 3 figures

Magnetic and structural transitions in layered FeAs systems: AFe2As2 versus RFeAsO compounds

Abstract

Keywords

Cite

Comments

Related papers