Lattice Distortion and Magnetic Order in Ca10(Fe2As2)5(Pt3As8)
Abstract
The Ca10(Fe2As2)5 (Pt3As8) compound is a member of the Fe-based high-temperature superconductor family. Recent work showed that this compound has a complex chemical structure with a skutterudite-type Pt-As intermediary layer sandwiched between tetrahedral Fe-As layers. We have studied the structural and magnetic properties of Ca10(Fe2As2)5 (Pt3As8) by single-crystal x-ray and neutron diffraction. Similar to other compounds in the iron arsenide family, we observed a lattice distortion from tetragonal to orthorhombic symmetry below approximately 110 K and stripe-like antiferromagnetic order below approximately 100 K. Both phase transitions are 2nd order in nature. The magnetic order and lattice distortion in the iron arsenides appear to be robust against deviations from simple structure motifs. This research was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Contract No. DE-AC02-07CH11358.
- Publication:
-
APS March Meeting Abstracts
- Pub Date:
- March 2014
- Bibcode:
- 2014APS..MARD13010S