Abstract
The magnetic structure of the intermetallic antiferromagnet was determined using x-ray resonant magnetic scattering. Below , has a commensurate antiferromagnetic structure with a propagation vector . The Sm magnetic moments lie in the plane and are rotated roughly 18° away from the axis. The magnetic structure of this compound was obtained by measuring the strong dipolar resonant peak whose enhancement was of over 2 orders of magnitude at the edge. At the edge, both quadrupolar and dipolar features were observed in the energy line shape. The magnetic structure and properties of are found to be consistent with the general trend already seen for the Nd-, Tb-, and the Ce-based compounds from the family ( earth; or Ir; ; ), where the crystalline electrical field effects determine the direction of magnetic moments and the evolution in the series. The measured Néel temperature for is slightly suppressed when compared to the of the parent cubic compound .
- Received 22 April 2007
DOI:https://doi.org/10.1103/PhysRevB.76.104515
©2007 American Physical Society