TY  - JOUR
AU  - Li, H.
AU  - Yan, J.-Q.
AU  - Kim, J. W.
AU  - McCallum, R. W.
AU  - Lograsso, T. A.
AU  - Vaknin, D.
TI  - Anisotropic magnetoelastic coupling in single-crystalline CeFeAsO as seen via high-resolution x-ray diffraction
JO  - Physical review / B
VL  - 84
IS  - 22
SN  - 1098-0121
CY  - College Park, Md.
PB  - APS
M1  - PreJuSER-19306
SP  - 220501
PY  - 2011
N1  - Research at Ames Laboratory is supported by the US Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Contract No. DE-AC02-07CH11358. Use of the Advanced Photon Source at Argonne National Laboratory was supported by the US Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.
AB  - 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.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000297549700002
DO  - DOI:10.1103/PhysRevB.84.220501
UR  - https://juser.fz-juelich.de/record/19306
ER  -