Document Type

Article

Publication Date

12-1-2011

Journal or Book Title

Physical Review B

Volume

84

Issue

22

First Page

220501(R)

DOI

10.1103/PhysRevB.84.220501

Abstract

Single-crystal synchrotron x-ray diffraction studies of CeFeAsO reveal strong anisotropy in the charge-correlation lengths along or perpendicular to the in-plane antiferromagnetic (AFM) wave vector at low temperatures, indicating an anisotropic two-dimensional magnetoelastic coupling. The high-resolution setup allows to distinctly monitor each of the twin domains by virtue of a finite misfit angle between them that follows the order parameter. In addition, we find that the in-plane correlations, above the orthorhombic (O)-to-tetragonal (T) transition, are shorter than those in each of the domains in the AFM phase, indicating a distribution of the in-plane lattice constants. This strongly suggests that the phase above the structural O-to-T transition is virtually T with strong O-T fluctuations that are probably induced by spin fluctuations.

Comments

This article is from Physical Review B 84 (2011): 220501(R), doi:10.1103/PhysRevB.84.220501.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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