Magnetic order of the iron spins in NdFeAsO

Published

August 21, 2008

Author(s)

Ying Chen, Jeffrey Lynn, Jiying Li, G. J. Li, G. F. Chen, J. L. Luo, N. L. Wang, Pengcheng Dai, Clarnia dela Cruz, H. A. Mook

Abstract

Polarized and unpolarized neutron diffraction measurements have been carried out to investigate the iron magnetic order in undoped NdOFeAs. Antiferromagnetic order is observed below 141(6) K, which is in close proximity to the structural distortion observed in this material. The magnetic structure consists of chains of parallel spins that are arranged antiparallel between chains, which is the same in-plane spin arrangement as observed in all the other iron oxypnictide materials. Nearest-neighbor spins along the c-axis are antiparallel like LaOFeAs. The ordered moment is 0.25(7) ¿B, which is the smallest moment found so far in these systems.

Citation

Physical Review B

Volume

78

Issue

6

Pub Type

Journals

Download Paper

https://doi.org/10.1103/physrevb.78.064515

Local Download

Keywords

neutron diffraction, magnetic order, magnetic phase transition, iron-based superconductor, itinerant electron magnet

Citation

Chen, Y. , Lynn, J. , Li, J. , Li, G. , Chen, G. , Luo, J. , Wang, N. , Dai, P. , dela Cruz, C. and Mook, H. (2008), Magnetic order of the iron spins in NdFeAsO, Physical Review B, [online], https://doi.org/10.1103/physrevb.78.064515, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=610021 (Accessed October 14, 2025)