Structural and magnetic phase transitions in triclinic Ca10(FeAs)10(Pt3As8)

Authors :: Stürzer, T.
Friederichs, G. M.
Luetkens, H.
Amato, A.
Klauss, H. -H.
Winter, F.
Pöttgen, R.
Johrendt, D.
Source :: J. Phys.: Condens. Matter 25, 122203 (2013)
Publication Year :: 2012
Abstract: We report the structural and magnetic phase transitions of triclinic Ca10(FeAs)10(Pt3As8). High-resolution X-ray powder diffraction reveals splitting of the in-plane (a,b) lattice parameters at Ts ~ 120 K. Platinum-doping weakens the distortion and shifts the transition temperature to 80 K in Ca10(Fe1-xPt_xAs)10(Pt3As8) with x = 0.03. muSR experiments show the onset of magnetic order near Ts and a broad magnetic phase transition. No symmetry breaking is associated to the structural transition in Ca10(FeAs)10(Pt3As8) in contrast to the other parent compounds of iron arsenide superconductors.<br />Comment: 3 pages, 5 figures