Design and discovery of CaKRu<sub>4</sub>P<sub>4</sub>: a new member of the generalized 1144 structure.
ORAL
Abstract
AeAFe4As4 (Ae=Ca, Sr; A=K, Rb, Cs) compounds were discovered as a new structural type [1] which has alternate stacking of the Ae and A layers. The AeAFe4As4 structure is stabilized by the combination of large Δc (= cA122-cAe122) and small Δa (= aA122-aAe122), where a and c are lattice parameters of the AFe2As2 and AeFe2As2 parent structures. In this presentation this idea was extended to similar, phosphorus-based 122 compounds with large Δc and small Δa values, in particular CaKRu4P4, whose stability was recently predicted by first principle calculations [2]. We synthesize polycrystalline CaKRu4P4 by solid state reaction of CaRu2P2 and KRu2P2. The crystallographic structure and physical properties of CaKRu4P4 will be presented.
[1] Akira Iyo, et al., J. Am. Chem. Soc. 138, 3410 (2016)
[2] Song Boqun, et al., APS March Meeting (2019)
[1] Akira Iyo, et al., J. Am. Chem. Soc. 138, 3410 (2016)
[2] Song Boqun, et al., APS March Meeting (2019)
*This work was supported by the US DOE, Basic Energy Sciences, Materials Science and Engineering Division under contract No.DE-AC02-07CH11358. O.P. was supported by the Critical Materials Institute, an Energy Innovation Hub funded by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Advanced Manufacturing Office.
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Presenters
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Mingyu Xu
- Ames Laboratory, Iowa State University, Dept. of Physics and Astronomy, Ames
- Iowa State University/AmesLab
- Iowa State University