Anisotropic three-dimensional magnetism in CaFe2As2

Abstract

Inelastic neutron scattering measurements on the low energy spin waves in CaFe2As2 show that the magnetic exchange interactions in the Fe layers are exceptionally large and similar to the cuprates. However, the exchange between layers is ~10% of the coupling in the layers and the magnetism is more appropriately categorized as anisotropic three-dimensional, in contrast to the two-dimensional cuprates. Band structure calculations of the spin dynamics and magnetic exchange interactions are in good agreement with the experimental data.

17 pages, 3 figures

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Cited by in corpus (64)

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• Competition and coexistence of antiferromagnetism and superconductivity in underdoped Ba(Fe0.953Co0.047)2As2
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• The nature of the magnetic and structural phase transitions in BaFe${}_2$As${}_2$
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• Electron-doping evolution of the low-energy spin excitations in the iron arsenide BaFe${}_{2-x}$Ni${}_x$As${}_2$ superconductors
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• Pnictides as frustrated quantum antiferromagnet close to a quantum phase transition
• Lattice and electronic anomalies of CaFe_2As_2 studied by Raman spectroscopy
• Suppression of antiferromagnetic spin fluctuations in the collapsed tetragonal phase of CaFe2As2
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• Magnetic structure and spin excitations in BaMn2Bi2
• ARPES measurements of the superconducting gap of Fe-based superconductors and their implications to the pairing mechanism
• Superelasticity and Cryogenic Linear Shape Memory Effects of CaFe2As2
• Effective One-Dimensional Coupling in the Highly-Frustrated Square-Lattice Itinerant Magnet CaCo${}_{2-y}$As${}_2$
• Influence of Magnetism on Phonons in CaFe2As2 Via Inelastic X-ray Scattering
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• Spin-Density-Wave Gap with Dirac Nodes and Two-Magnon Raman Scattering in BaFe2As2
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• Crossover from spin-waves to diffusive spin excitations in underdoped Ba(Fe${}_{1-x}$Co${}_x$)${}_2$As${}_2$
• Neutron Scattering Measurements of Spatially Anisotropic Magnetic Exchange Interactions in Semiconducting K0.85Fe1.54Se2 (TN=280 K)
• Low Energy, Coherent, Stoner-like Excitations in CaFe${}_2$As${}_2$
• Spin Excitations in BaFe1.84Co0.16As2 Superconductor Observed by Inelastic Neutron Scattering
• Magneto Seebeck effect in REFeAsO (RE=rare earth) compounds: probing the magnon drag scenario
• Spin dynamics in electron-doped pnictide superconductors
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• Low-temperature thermal conductivity of BaFe2As2: Parent compound of iron-arsenide superconductors
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• Three-dimensional spin susceptibility in Ba${}_{0.75}$K${}_{0.25}$Fe${}_2$As${}_2$: Out-of-plane modulation revealed by neutron spectroscopy and theoretical modeling