Synthesis, Structure and Magnetic Properties of New Layered Iron-Oxychalcogenide Na2Fe2OSe2

Abstract

A new layered iron-oxychalcogenide Na2Fe2OSe2 has been synthesized and structurally characterized by powder X-ray diffraction. The structure is formed by alternate stacking of the newly discovered [Fe2OSe2] blocks and double layers of Na. Conductivity study shows that Na2Fe2OSe2 is a semiconductor with activation energy of 0.26 eV. Magnetic susceptibility and heat capacity measurements reveal an antiferromagnetic phase transition occurs at TN=73 K. A broad maximum of magnetic susceptibility and a slow decay of the specific heat above TN, arises as a result of two-dimensional short-range spin correlation.

4 pages, 4 figures

References in corpus (7)

• Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2
• Superconductivity at 43 K in Samarium-arsenide Oxides $SmFeAs{O}_{1-x}{F}_x$
• Superconductivity at 41 K and its competition with spin-density-wave instability in layered CeO${}_{1-x}$F${}_x$FeAs
• The superconductivity at 18 K in LiFeAs system
• Superconductivity in iron-based F-doped layered quaternary compound Nd[O1-xFx]FeAs
• (Sr_3Sc_2O_5)Fe_2As_2 as a possible parent compound for FeAs-based superconductors
• Low-temperature nuclear and magnetic structures of La2O2Se2.Fe2O from X-ray and neutron diffraction measurements

Cited by in corpus (15)

• Weak metal-metal transition in the vanadium oxytelluride Rb${}_{1-\delta }$V${}_2$Te${}_2$O
• Structure and physical properties of new layered iron oxychalcogenide BaFe2OSe2
• BaFe2Se2O as an Iron-Based Mott Insulator with Antiferromagnetic Order
• Quasi-two-dimensional non-collinear magnetism in the Mott insulator Sr${}_2$F${}_2$Fe${}_2$OS${}_2$
• The magnetic and electronic properties of Oxyselenides - influence of transition metal ions and lanthanides
• Superconductivity in ThMo2Si2C with Mo2C Square Net
• Magnetic and Structural Properties of the Iron Oxychalcogenides La${}_2$O${}_2$Fe${}_2$O$M_2$ ($M$= S, Se)
• (CaO)(FeSe): A Layered Wide Gap Oxychalcogenide Semiconductor
• Phonon and magnetic dimer excitations in Fe-based S=2 spin ladder compound BaFe${}_2$Se${}_2$O
• Electron Correlation and Spin Dynamics in Iron Pnictides and Chalcogenides
• Electronic, magnetic properties and correlation effects in the layered quaternary iron oxyselenide Na2Fe2Se2O from first principles
• Multi-$Q$ magnetic phases from frustration and chiral interactions
• Chemistry and physics of layered oxychalcogenides containing an anti-cuprate type square lattice
• Real-space orbital tiling approach for the design of novel superconductors
• Magnetism and Correlated Electrons in LaCr${}_2$Ge${}_2$N