Neutron-Diffraction Measurements of Magnetic Order and a Structural Transition in the Parent BaFe 2 As 2 Compound of FeAs-Based High-Temperature Superconductors
National Institute of Standards and Technology · NIST Center for Neutron Research · +4 more institutions
Abstract
The recent discovery of superconductivity in (Ba,K)Fe2As2, which crystallizes in the ThCr2Si2 (122) structure as compared with the LnFeAsO (Ln is lanthanide) systems that possess the ZrCuSiAs (1111) structure, demonstrates the exciting potential of the FeAs-based materials for high-T{C} superconductivity. Here we report neutron diffraction studies that show a tetragonal-to-orthorhombic distortion associated with the onset of q=(101) antiferromagnetic order in BaFe2As2, with a saturation moment 0.87(3)micro {B} per Fe that is orientated along the longer a axis of the ab planes. The simultaneous first-order structural and magnetic transition is in contrast with the separated transitions previously reported in…
Citation impact
- FWCI
- 41.56
- Percentile
- 100%
- References
- 37
Authors
9- QHQing HuangCorresponding
National Institute of Standards and Technology, NIST Center for Neutron Research
- YQYunfeng Qiu
University of Maryland, College Park, National Institute of Standards and Technology, NIST Center for Neutron Research
- WBWei Bao
Los Alamos National Laboratory
- MGMark Green
National Institute of Standards and Technology, NIST Center for Neutron Research, University of Maryland, College Park
- JWJ. W. Lynn
National Institute of Standards and Technology, NIST Center for Neutron Research
Topics & keywords
- Antiferromagnetism
- Tetragonal crystal system
- Orthorhombic crystal system
- Condensed matter physics
- Neutron diffraction
- Order (exchange)
- Crystallography
- Physics