Spin waves and magnetic exchange interactions in CaFe 2 As 2
By Jun Zhao, D. Adroja, D. Yao, R. Bewley, Shiliang Li, Xiangfeng Wang, G. Wu, Xianhui Chen, Jiangping Hu, Pengcheng Dai. 2009
232 citations recorded by the source corpus.
It is likely that antiferromagnetism has a role in the superconductivity of iron arsenide. But is the magnetism local, as described by the Heisenberg model, or itinerant, which is more in agreement with the Stoner model? The answer is both.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/008a69b8171d790dee73607685d7373a5c7426b9
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In Condensed Matter Physics
In Electronic, Optical and Magnetic Materials
Citations in the corpus
- In-plane electronic anisotropy of underdoped ‘122’ Fe-arsenide superconductors revealed by measurements of detwinned single crystals (2011, background): “…early inelastic neutron scattering experiments for CaFe2As2 revealed an anisotropic spin-wave dispersion that can be best fit by a J1a−J1b−J2 model (Zhao et al 2009), where J1a and J1b, the nearest neighbor exchange constants along the orthorhombic a- and b-axes, differ both in magnitude and…”
- Superconductivity in iron compounds (2011, background): “In CaFe2As2, measurements of INS to shorter wavelengths out to the zone boundary (Zhao et al., 2009) have been able to determine the signs of the exchange coupling constants J1a and J1b in the plane, with the result that the former is antiferromagnetic and the latter is ferromagnetic.”
- Magnetism and its microscopic origin in iron-based high-temperature superconductors (2012, background): “Although there are still debates concerning whether spin waves in these materials can be described by a pure itinerant picture [65, 67] or require local moments [66, 68],”