Element-specific x-ray resonant magnetic scattering investigations were performed to determine the magnetic structure of Eu in EuRh2As2. In the temperature range from 46 K down to 6 K, an incommensurate antiferromagnetic (ICM)structure with a temperature dependent propagation vector (0 0 0.9) coexists with a commensurate antiferromagnetic (CM) structure. Angular-dependent measurements of the magnetic intensity indicate that the magnetic moments lie in the tetragonal basal plane and are ferromagnetically aligned within the a-b plane for both magnetic structures. The ICM structure is a spiral-like magnetic structure with a turn angle of 162 deg between adjacent Eu planes. In the CM structure, this angle is 180 deg. These results are consistent with band-structure calculations which indicate a strong sensitivity of the magnetic configuration on the Eu valence.
@article{arxiv.0902.0975,
title = {Magnetic ordering in EuRh2As2 studied by x-ray resonant magnetic scattering},
author = {S. Nandi and A. Kreyssig and Y. Lee and Yogesh Singh and J. W. Kim and D. C. Johnston and B. N. Harmon and A. I. Goldman},
journal= {arXiv preprint arXiv:0902.0975},
year = {2010}
}
Comments
5 pages, 5 figures (technical problem with abstract corrected, no other changes)