Self doping effect and successive magnetic transitions in superconducting Sr${}_2$VFeAsO${}_3$

Abstract

We have studied a quinary Fe-based superconductor Sr${}_2$VFeAsO${}_3$ by the measurements of x-ray diffraction, x-ray absorption, Mössbauer spectrum, resistivity, magnetization and specific heat. This apparently undoped oxyarsenide is shown to be self doped via electron transfer from the V${}^{3+}$ ions. We observed successive magnetic transitions within the VO${}_2$ layers: an antiferromagnetic transition at 150 K followed by a weak ferromagnetic transition at 55 K. The spin orderings within the VO${}_2$ planes are discussed based on mixed valence of V${}^{3+}$ and V${}^{4+}$.

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• Synthesis, crystal structure and superconductivity in Rb$L{n}_2$Fe${}_4$As${}_4$O${}_2$ ($Ln$ = Sm, Tb, Dy and Ho)
• 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
• Correlation of Fe-based Superconductivity and Electron-Phonon Coupling in an FeAs/Oxide Heterostructure
• Switching Magnetism and Superconductivity with Spin-Polarized Current in Iron-Based Superconductor
• Suppression of superconductivity by V-doping and possible magnetic order in Sr2VO3FeAs
• Correlation-induced self-doping in intercalated iron-pnictide superconductor Ba2Ti2Fe2As4O
• Static magnetic order of Sr${}_4$A${}_2$O${}_6$Fe${}_2$As${}_2$ (A = Sc and V) revealed by local probes
• Topological magnetic order and superconductivity in EuRbFe${}_4$As${}_4$
• Magnetism and superconductivity in Sr${}_2$VFeAsO${}_3$ revealed by ${}^{75}$As- and ${}^{51}$V-NMR under elevated pressures
• Weak magnetism and the Mott-state of vanadium in superconducting Sr2VO3FeAs
• Pressure Dependence of Superconducting Transition Temperature on Perovskite-Type Fe-Based Superconductors and NMR Study of Sr2VFeAsO3
• Antiferromagnetic Order and Superconductivity in Sr4(Mg0.5-xTi0.5+x)2O6Fe2As2 with Electron Doping: 75As-NMR Study
• Superconducting transition temperatures in the electronic and magnetic phase diagrams of Sr2VFeAsO3-delta, a superconductor
• High-$T_c$ Iron-phosphide Superconductivity Enhanced by Reemergent Antiferromagnetic Spin Fluctuations in (Sr${}_4$Sc${}_2$O${}_6$)Fe${}_2$(As${}_{1-x}$P${}_x$)${}_2$ probed by NMR
• Mössbauer spectroscopy study of magnetic fluctuations in superconducting RbGd${}_2$Fe${}_4$As${}_4$O${}_2$
• Successive transition from superconducting to antiferromagnetic phase in (Ca_6(Al, Ti)_4O_y)Fe_2As_2 studied via ^{75}As and ^{27}Al NMR
• Local Magnetic States of the Weakly Ferromagnetic Iron-Based Superconductor Sr${}_2$VFeAsO${}_{3-\delta }$ Studied by X-ray Magnetic Circular Dichroism
• Coupled Magnetic and Superconducting Transitions in Sr${}_2$VO${}_3$FeAs Under Pressure
• Study of the rare earth effects on the magnetic fluctuations in RbLn${}_2$Fe${}_4$As${}_4$O${}_2$ (Ln = Tb, Dy and Ho) by Mössbauer spectroscopy
• Ultrasonic investigation of the Kondo semimetal CeBi
• Role of Vanadium-Oxide Layer in Electronic State of Sr${}_2$VFeAsO${}_{3-\delta }$ with Oxygen Deficiency
• Multiple magnetic orders discovered in the superconducting state of EuFe${}_2$(As${}_{1-x}$P${}_x$)${}_2$
• Proximity-induced hidden order transition in a correlated heterostructure Sr${}_2$VO${}_3$FeAs