Lattice distortion and stripelike antiferromagnetic order in Ca-10(Pt3As8)(Fe2As2)(5)


Sapkota A., TUCKER G. S. , Ramazanoglu M. K. , TIAN W., NI N., Cava R. J. , ...Daha Fazla

PHYSICAL REVIEW B, cilt.90, 2014 (SCI İndekslerine Giren Dergi) identifier identifier

Özet

Ca-10(Pt3As8)(Fe2As2)(5) is the parent compound for a class of Fe-based high-temperature superconductors where superconductivity with transition temperatures up to 30 K can be introduced by partial element substitution. We present a combined high-resolution high-energy x-ray diffraction and elastic neutron scattering study on a Ca-10(Pt3As8)(Fe2As2)(5) single crystal. This study reveals the microscopic nature of two distinct and continuous phase transitions to be very similar to other Fe-based high-temperature superconductors: an orthorhombic distortion of the high-temperature tetragonal Fe-As lattice below T-S = 110(2) K followed by stripelike antiferromagnetic ordering of the Fe moments below T-N = 96(2) K. These findings demonstrate that major features of the Fe-based high-temperature superconductors are very robust against variations in chemical constitution as well as structural imperfection of the layers separating the Fe-As layers from each other and confirms that the Fe-As layers primarily determine the physics in this class of material.