Magnetic order of the iron spins in NdFeAsO

被引：111

作者：

Chen, Ying ^{[1
,2
]}

Lynn, J. W. ^{[1
]}

Li, J. ^{[1
,2
]}

Li, G. ^{[3
]}

Chen, G. F. ^{[3
]}

Luo, J. L. ^{[3
]}

Wang, N. L. ^{[3
]}

Dai, Pengcheng ^{[4
,5
]}

dela Cruz, C. ^{[4
,5
]}

Mook, H. A. ^{[5
]}

机构：

[1] Natl Inst Stand & Technol, Ctr Neutron Res, Gaithersburg, MD 20899 USA

[2] Univ Maryland, Dept Mat Sci & Engn, College Pk, MD 20742 USA

[3] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[4] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA

[5] Oak Ridge Natl Lab, Neutron Scattering Sci Div, Oak Ridge, TN 37831 USA

来源：

PHYSICAL REVIEW B | 2008年 / 78卷 / 06期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevB.78.064515

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Polarized and unpolarized neutron-diffraction measurements have been carried out to investigate the iron magnetic order in undoped NdFeAsO. Antiferromagnetic order is observed below [4](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 LaFeAsO. The ordered moment is 0.25(7) mu(B), which is the smallest moment found so far in these systems.

引用

页数：5

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