Magnetic phase diagram in Eu${}_{1-x}$La${}_x$Fe${}_2$As${}_2$ single crystals

Abstract

We have systematically measured resistivity, susceptibility and specific heat under different magnetic fields (H) in Eu${}_{1-x}$La${}_x$Fe${}_2$As${}_2$ single crystals. It is found that a metamagnetic transition from A-type antiferromagnetism to ferromagnetism occurs at a critical field for magnetic sublattice of $E{u}^{2+}$. The jump of specific heat is suppressed and shifts to low temperature with increasing H up to the critical value, then shifts to high temperature with further increasing H. Such behavior supports the metamagnetic transition. Detailed H-T phase diagrams for x=0 and 0.15 crystals are given, and possible magnetic structure is proposed. Magnetoresistance measurements indicate that there exists a strong coupling between local moment of $E{u}^{2+}$ and charge in Fe-As layer. These results are very significant to understand the underlying physics of FeAs superconductors.

arXiv comment5 pages, 4 figures

References in corpus (20)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems
• 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
• Magnetic order in BaFe2As2, the parent compound of the FeAs based superconductors in a new structural family
• Structural and magnetic phase diagram of CeFeAsO1-xFx and its relationship to high-temperature superconductivity
• Superconductivity and Phase Diagram in the Iron-based Arsenic-oxides ReFeAsO1-delta (Re = rare earth metal) without F-Doping
• Competing Orders and Spin-Density-Wave Instability in La(O${}_{1-x}$F${}_x$)FeAs
• The electronic phase diagram of the LaO1-xFxFeAs superconductor
• Coexistence of the spin-density-wave and superconductivity in the (Ba,K)Fe2As2
• Anisotropy in the electrical resistivity and susceptibility of superconducting BaFe${}_2$As${}_2$ single crystals
• High-Temperature Superconductivity in Eu0.5K0.5Fe2As2
• Antiferromagnetic transition in EuFe${}_2$As${}_2$: A possible parent compound for superconductors
• Structure and Magnetic Order in the NdFeAs(O,F) Superconductor System
• Lattice and Magnetic structures of PrFeAsO, PrFeAsO0.85F0.15 and PrFeAsO0.85
• Metamagnetic transition in EuFe${}_2$As${}_2$ single crystals
• Superconductivity at 34.7 K in the iron arsenide Eu0.7Na0.3Fe2As2
• Metamagnetic Transition in Na${}_{0.85}$CoO${}_2$ Single Crystals
• Spin-Charge Coupling in lightly doped Nd${}_{2-x}$Ce${}_x$CuO${}_4$
• Giant Anisotropy of Magnetoresistance and "Spin Valve" effect in Antiferromagnetic $N{d}_{2-x}C{e}_{x}Cu{O}_4$
• Hysteresis and Anisotropic Magnetoresistance in Antiferromagnetic $N{d}_{2-x}C{e}_{x}Cu{O}_4$

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• High-resolution angle-resolved photoemission spectroscopy study of the electronic structure of EuFe2As2
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• Spin-dependent conductivity of iron-based superconductors in a magnetic field