First order structural phase transition in CaFe$_2$As$_2$
By N. Ni, Shibabrata Nandi, A. Kreyssig, A. I. Goldman, E. Mun, S. Bud’ko, Paul C. Canfield. 2008
144 citations recorded by the source corpus.
CaFe$_2$As$_2$ has been synthesized and found to form in the tetragonal, ThCr$_2$Si$_2$ structure with lattice parameters $a = 3.912(68) \AA$ and $c = 11.667(45) \AA$. Upon cooling through 170 K, CaFe$_2$As$_2$ undergoes a first order, structural phase transition to a low temperature, orthorhombic phase with a $2 - 3$ K range of hysteresis and coexistence. This transition is clearly evident in microscopic, thermodynamic and transport measurements. CaFe$_2$As$_2$ is the third member of the AFe$_2$As$_2$ (A = Ba, Sr, Ca) family to exhibit such a dramatic phase transition and is a promising candidate for studies of doping induced superconductivity.
Subfields: Condensed Matter Physics, Electronic, Optical and Magnetic Materials
View Paper: https://www.semanticscholar.org/paper/362a133b2b148045b1a083f11412ff3ae12c601f
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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): “The temperature difference monotonically increases with increasing concentration of the substituent, at least until the top of the superconducting dome (Ni et al 2008a, Chu et al 2009, Lester et al 2009, Nandi et al 2010, Ni et al 2010).”