First order structural phase transition in CaFe${}_2$As${}_2$

N. Ni, S. Nandi, A. Kreyssig +4

CaFe${}_2$As${}_2$ has been synthesized and found to form in the tetragonal, ThCr${}_2$Si${}_2$ structure with lattice parameters $a=3.912(68)\mathring{A}$ and $c=11.667(45)\mathring{A}$. Upon cooling thr…