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Magnetic order of the iron spins in NdFeAsO



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


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.
Physical Review B


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


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],, (Accessed April 23, 2024)
Created August 21, 2008, Updated March 21, 2024