Published August 1, 2008
| Version v1
Journal article
Doping evolution of antiferromagnetic order and structural distortion in LaFeAsO1-xFx
- 1. NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102 (United States)
- 2. Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996-1200 (United States)
- 3. Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P.O. Box 603, Beijing 100080 (China)
- 4. Neutron Scattering Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393 (United States)
Description
We use neutron scattering to study the structural distortion and antiferromagnetic (AFM) order in LaFeAsO1-xFx as the system is doped with fluorine (F) to induce superconductivity. In the undoped state, LaFeAsO exhibits a structural distortion, changing the symmetry from tetragonal (space group P4/nmm) to orthorhombic (space group Cmma) at 155 K, and then followed by an AFM order at 137 K. Doping the system with F gradually decreases the structural distortion temperature, but suppresses the long range AFM order before the emergence of superconductivity. Therefore, while superconductivity in these Fe oxypnictides can survive in either the tetragonal or the orthorhombic crystal structure, it competes directly with static AFM order
Additional details
Identifiers
- DOI
- 10.1103/PhysRevB.78.054529;
- arXiv
- arXiv:0809.4816v2;
Publishing Information
- Journal Title
- Physical Review. B, Condensed Matter and Materials Physics
- Journal Volume
- 78
- Journal Issue
- 5
- Journal Page Range
- p. 054529-054529.6
- ISSN
- 1098-0121
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 40023534
- Subject category
- S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
- Descriptors DEI
- ANTIFERROMAGNETIC MATERIALS; ANTIFERROMAGNETISM; ARSENIC COMPOUNDS; ATOMIC FORCE MICROSCOPY; CRYSTAL STRUCTURE; DOPED MATERIALS; FLUORINE ADDITIONS; HIGH-TC SUPERCONDUCTORS; IRON COMPOUNDS; LANTHANUM COMPOUNDS; NEUTRON DIFFRACTION; ORTHORHOMBIC LATTICES; OXYGEN COMPOUNDS; PHASE DIAGRAMS; PHASE TRANSFORMATIONS; SCATTERING; SPACE GROUPS; SUPERCONDUCTIVITY; TEMPERATURE RANGE 0065-0273 K; TETRAGONAL LATTICES
- Descriptors DEC
- COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIAGRAMS; DIFFRACTION; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; INFORMATION; MAGNETIC MATERIALS; MAGNETISM; MATERIALS; MICROSCOPY; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SCATTERING; SUPERCONDUCTORS; SYMMETRY GROUPS; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS; TYPE-II SUPERCONDUCTORS
Optional Information
- Notes
- (c) 2008 The American Physical Society