AFe2As2(A = Ca, Sr, Ba, Eu) and SrFe2-xTMxAs2(TM = Mn, Co, Ni): crystal structure, charge doping, magnetism and superconductivity

Kasinathan, Deepa; Ormeci, Alim; Koch, Karl‐Heinz; Burkhardt, Ulrich; Schnelle, Walter; Leithe‐Jasper, Andreas; Rösner, H.

doi:10.1088/1367-2630/11/2/025023

Cited by 157 publications

(190 citation statements)

References 34 publications

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“…This topic has been already discussed and was extensively studied. Different explanations were proposed ranging from frustration and (a non-observed) lattice distortion to spin fluctuations and effect of lattice-dimensionality (Refs [2,27,35,36,37,38,39] and references therein provide some relevant details on this regards for both measured and calculated magnetic moments in the Fe-pnictides). In the lattice dynamics calculations, in order to determine all inter-atomic force constants, the super cell approach has been adopted [40,41].…”

Section: Computational Detailsmentioning

confidence: 99%

Magnetic lattice dynamics of the oxygen-free FeAs pnictides: how sensitive are phonons to magnetic ordering?

Zbiri

Mittal

Rols

et al. 2010

J. Phys.: Condens. Matter

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Abstract. To shed light on the role of magnetism on the superconducting mechanism of the oxygen-free FeAs pnictides, we investigate the effect of magnetic ordering on phonon dynamics in the low-temperature orthorhombic parent compounds, which present a spin-density wave. The study covers both the 122 (AFe 2 As 2 ; A=Ca, Sr, Ba) and 1111 (AFeAsF; A=Ca, Sr) phases. We extend our recent work on the Ca (122 and 1111) and Ba (122) cases by treating computationally and experimentally the 122 and 1111 Sr compounds. The effect of magnetic ordering is investigated through detailed non-magnetic and magnetic lattice dynamical calculations. The comparison of the experimental and calculated phonon spectra shows that the magnetic interactions/ordering have to be included in order to reproduce well the measured density of states. This highlights a spin-correlated phonon behavior which is more pronounced than the apparently weak electron-phonon coupling estimated in these materials. Furthermore, there is no noticeable difference between phonon spectra of the 122 Ba and Sr, whereas there are substantial differences when comparing these to CaFe 2 As 2 originating from different aspects of structure and bonding.

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Section: Computational Detailsmentioning

confidence: 99%

Magnetic lattice dynamics of the oxygen-free FeAs pnictides: how sensitive are phonons to magnetic ordering?

Zbiri

Mittal

Rols

et al. 2010

J. Phys.: Condens. Matter

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“…Interestingly, the same result may be achieved by partial substitution of some non-magnetic 4d, 5d metals (Ru, Ir etc.) by magnetic 3d metal (Fe), see [17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Electronic properties of novel 6 K superconductor LiFeP in comparison with LiFeAs from first principles calculations

Shein

Ivanovskiĭ

2010

Solid State Communications

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“…Due to the feasible high quality singe crystal growth by flux method for the ternary 122-type AFe 2 As 2 (A= Ba, Sr, Ca, Eu) superconductors with the ThCr 2 Si 2 -type crystal structure [4,5], these systems have been widely studied for their physical properties and high-T c mechanism [6].…”

Section: Introductionmentioning

confidence: 99%

Superconductivity in Undoped CaFe ₂ As ₂ Single Crystals

Dong-Yun

Jia

Ruan

et al. 2016

Chinese Phys. Lett.

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Single crystals of undoped CaFe 2 As 2 were grown by a FeAs self-flux method, and the crystals were quenched in ice-water rapidly after high temperature growth. The quenched crystal undergoes a collapsed tetragonal structural phase transition around 80 K revealed by the temperature dependent X-ray diffraction measurements.Superconductivity below 25 K was observed in the collapsed phase by resistivity and magnetization measurements. The isothermal magnetization curve measured at 2 K indicates that this is a typical type-II superconductor. For comparison, we systematically characterized the properties of the furnace cooled, quenched, and post-annealed single crystals, and found strong internal crystallographic strain existing in the quenched samples, which is the key for the occurrence of superconductivity in the undoped CaFe 2 As 2 single crystals.

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AFe₂As₂(A = Ca, Sr, Ba, Eu) and SrFe_2-xTM_xAs₂(TM = Mn, Co, Ni): crystal structure, charge doping, magnetism and superconductivity

Cited by 157 publications

References 34 publications

Magnetic lattice dynamics of the oxygen-free FeAs pnictides: how sensitive are phonons to magnetic ordering?

Magnetic lattice dynamics of the oxygen-free FeAs pnictides: how sensitive are phonons to magnetic ordering?

Electronic properties of novel 6 K superconductor LiFeP in comparison with LiFeAs from first principles calculations

Superconductivity in Undoped CaFe ₂ As ₂ Single Crystals

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AFe2As2(A = Ca, Sr, Ba, Eu) and SrFe2-xTMxAs2(TM = Mn, Co, Ni): crystal structure, charge doping, magnetism and superconductivity

Cited by 157 publications

References 34 publications

Magnetic lattice dynamics of the oxygen-free FeAs pnictides: how sensitive are phonons to magnetic ordering?

Magnetic lattice dynamics of the oxygen-free FeAs pnictides: how sensitive are phonons to magnetic ordering?

Electronic properties of novel 6 K superconductor LiFeP in comparison with LiFeAs from first principles calculations

Superconductivity in Undoped CaFe 2 As 2 Single Crystals

Contact Info

Product

Resources

About

AFe₂As₂(A = Ca, Sr, Ba, Eu) and SrFe_2-xTM_xAs₂(TM = Mn, Co, Ni): crystal structure, charge doping, magnetism and superconductivity

Superconductivity in Undoped CaFe ₂ As ₂ Single Crystals