Synthesis of New Layered Oxypnictides Sr2CrO2(FeAs)2

Abstract

We successfully synthesized new layered iron oxypnictide Sr2CrO2(FeAs)2 by solid-state-reaction techniques. This is the first report on the Fe-substituted Sr2Mn3As2O2-type oxypnictides to our knowledge. A pellet of stoichiometric mixtures of SrO, Cr and FeAs wrapped with tantalum foil was sintered at 900°C for 96 h. Results of x-ray diffraction measurement and Rietveld refinements show that the structure of the sample belongs to the space group of I4/mmm with the lattice constants of a = 3.9948(1) Å and c = 18.447(1) Å. Temperature dependence of the resistivity for Sr2CrO2(FeAs)2 shows semiconductor-like behavior. Additionally, the sample does not exhibit superconducting transition in measurements of resistivity and magnetization even in the low temperature down to 3 K.

arXiv comment6 pages, 4 figures, accepted for publication in Journal of the Physical Society of Japan

References in corpus (5)

• Transition of stoichiometricSr2VO3FeAs to a superconducting state at 37.2 K
• Chemistry of layered d-metal pnictide oxides and their potential as candidates for new superconductors
• New iron-based arsenide oxides (Fe2As2)(Sr4M2O6)(M = Sc, Cr)
• Synthesis, Structure and Properties of Tetragonal Sr2M3As2O2 (M3 = Mn3, Mn2Cu and MnZn2) Compounds Containing Alternating CuO2-Type and FeAs-Type Layers
• The layered iron arsenides Sr2CrO3FeAs and Ba2ScO3FeAs

Cited by in corpus (4)

• Crystal Chemistry and Structural Design of Iron-Based Superconductors
• Physical properties and electronic structure of Sr${}_2$Cr${}_3$As${}_2$O${}_2$ containing CrO${}_2$ and Cr${}_2$As${}_2$ square-planar lattices
• Neutron diffraction study on magnetic structures and transitions in Sr2Cr3As2O2
• Hybrid Crystals of Cuprates and Iron-Based Superconductors